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Добірка наукової літератури з теми "Strongly interacting quantum systems"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Strongly interacting quantum systems"

1

Ripka, Fabian, Harald Kübler, Robert Löw, and Tilman Pfau. "A room-temperature single-photon source based on strongly interacting Rydberg atoms." Science 362, no. 6413 (October 25, 2018): 446–49. http://dx.doi.org/10.1126/science.aau1949.

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Tailored quantum states of light can be created via a transfer of collective quantum states of matter to light modes. Such collective quantum states emerge in interacting many-body systems if thermal fluctuations are overcome by sufficient interaction strengths. Therefore, ultracold temperatures or strong confinement are typically required. We show that the exaggerated interactions between Rydberg atoms allow for collective quantum states even above room temperature. The emerging Rydberg interactions lead both to suppression of multiple Rydberg state excitations and destructive interference due to polariton dephasing. We experimentally implemented a four-wave mixing scheme to demonstrate an on-demand single-photon source. The combination of glass cell technology, identical atoms, and operation around room temperature promises scalability and integrability. This approach has the potential for various applications in quantum information processing and communication.
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2

Zaleski, T. A., and T. K. Kopeć. "Unconventional quantum critical points in systems of strongly interacting bosons." Physica B: Condensed Matter 449 (September 2014): 204–8. http://dx.doi.org/10.1016/j.physb.2014.05.038.

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3

See, Tian Feng. "Few-photon transport in strongly interacting light-matter systems: A scattering approach." International Journal of Quantum Information 17, no. 06 (September 2019): 1950050. http://dx.doi.org/10.1142/s0219749919500503.

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Engineering strong photon–photon interactions at the quantum level have been crucial in various areas of research, notably in quantum information processing and quantum simulation. It is often done by coupling matter strongly to light. A promising way to achieve this is via waveguide quantum electrodynamics (QED). Motivated by these advancements, we study few-photon transport in waveguide QED setups. First, we present a diagrammatic technique to systematically study multiphoton scattering based on the scattering formalism and Green’s function approach. We demonstrate our proposal through physically relevant examples involving scattering of few-photon states from two-level emitters as well as from arrays of correlated Kerr nonlinear resonators described by the Bose–Hubbard model. In the second part, we apply the diagrammatic technique that was developed to perform a comprehensive study on a Bose–Hubbard lattice with a quasi-periodic potential. This model exhibits many-body localisation. We compute the two-photon transmission probability and show that it carries signatures of the underlying localisation transition with close agreement to the participation ratio of the eigenstates. The systematic scattering approach provided in this paper provides a foundation for future works at the interface between quantum optics and condensed matter.
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4

Yan, Zhiguang, Yu-Ran Zhang, Ming Gong, Yulin Wu, Yarui Zheng, Shaowei Li, Can Wang, et al. "Strongly correlated quantum walks with a 12-qubit superconducting processor." Science 364, no. 6442 (May 2, 2019): 753–56. http://dx.doi.org/10.1126/science.aaw1611.

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Quantum walks are the quantum analogs of classical random walks, which allow for the simulation of large-scale quantum many-body systems and the realization of universal quantum computation without time-dependent control. We experimentally demonstrate quantum walks of one and two strongly correlated microwave photons in a one-dimensional array of 12 superconducting qubits with short-range interactions. First, in one-photon quantum walks, we observed the propagation of the density and correlation of the quasiparticle excitation of the superconducting qubit and quantum entanglement between qubit pairs. Second, when implementing two-photon quantum walks by exciting two superconducting qubits, we observed the fermionization of strongly interacting photons from the measured time-dependent long-range anticorrelations, representing the antibunching of photons with attractive interactions. The demonstration of quantum walks on a quantum processor, using superconducting qubits as artificial atoms and tomographic readout, paves the way to quantum simulation of many-body phenomena and universal quantum computation.
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5

Minguzzi, A., and P. Vignolo. "Strongly interacting trapped one-dimensional quantum gases: Exact solution." AVS Quantum Science 4, no. 2 (June 2022): 027102. http://dx.doi.org/10.1116/5.0077423.

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Understanding the effect of correlations in interacting many-body systems is one of the main challenges in quantum mechanics. While the general problem can only be addressed by approximate methods and numerical simulations, in some limiting cases, it is amenable to exact solutions. This Review collects the predictions coming from a family of exact solutions which allows us to obtain the many-body wavefunction of strongly correlated quantum fluids confined by a tight waveguide and subjected to any form of longitudinal confinement. It directly describes the experiments with trapped ultracold atoms where the strongly correlated regime in one dimension has been achieved. The exact solution applies to bosons, fermions, and mixtures. It allows us to obtain experimental observables such as the density profiles and momentum distribution at all momentum scales, beyond the Luttinger liquid approach. It also predicts the exact quantum dynamics at all the times, including the small oscillation regime yielding the collective modes of the system and the large quench regime where the system parameters are changed considerably. The solution can be extended to describe finite-temperature conditions, spin, and magnetization effects. The Review illustrates the idea of the solution, presents the key theoretical achievements, and the main experiments on strongly correlated one-dimensional quantum gases.
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de los Santos-Sánchez, Octavio, and Ricardo Román-Ancheyta. "Strain-spectroscopy of strongly interacting defects in superconducting qubits." Superconductor Science and Technology 35, no. 3 (January 31, 2022): 035005. http://dx.doi.org/10.1088/1361-6668/ac4150.

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Abstract The proper functioning of some micro-fabricated novel quantum devices, such as superconducting resonators and qubits, is severely affected by the presence of parasitic structural material defects known as tunneling two-level-systems (TLS). Recent experiments have reported unambiguous evidence of the strong interaction between individual (coherent) TLS using strain-assisted spectroscopy. This work provides an alternative and simple theoretical insight that illustrates how to obtain the spectral response of such strongly interacting defects residing inside the amorphous tunnel barrier of a qubit’s Josephson junction. Moreover, the corresponding spectral signatures obtained here may serve to quickly and efficiently elucidate the actual state of these interacting TLS in experiments based on strain or electric-field spectroscopy.
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7

Bohr, D., P. Schmitteckert, and P. Wölfle. "DMRG evaluation of the Kubo formula —Conductance of strongly interacting quantum systems." Europhysics Letters (EPL) 73, no. 2 (January 2006): 246–52. http://dx.doi.org/10.1209/epl/i2005-10377-6.

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8

Janiš, V., and D. Vollhardt. "Coupling of quantum degrees of freedom in strongly interacting disordered electron systems." Physical Review B 46, no. 24 (December 15, 1992): 15712–15. http://dx.doi.org/10.1103/physrevb.46.15712.

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Song, Xueyu, and Alexei A. Stuchebrukhov. "Outer‐sphere electron transfer in polar solvents: Quantum scaling of strongly interacting systems." Journal of Chemical Physics 99, no. 2 (July 15, 1993): 969–78. http://dx.doi.org/10.1063/1.465310.

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10

Sachkou, Yauhen P., Christopher G. Baker, Glen I. Harris, Oliver R. Stockdale, Stefan Forstner, Matthew T. Reeves, Xin He, et al. "Coherent vortex dynamics in a strongly interacting superfluid on a silicon chip." Science 366, no. 6472 (December 19, 2019): 1480–85. http://dx.doi.org/10.1126/science.aaw9229.

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Quantized vortices are fundamental to the two-dimensional dynamics of superfluids, from quantum turbulence to phase transitions. However, surface effects have prevented direct observations of coherent two-dimensional vortex dynamics in strongly interacting systems. Here, we overcome this challenge by confining a thin film of superfluid helium at microscale on the atomically smooth surface of a silicon chip. An on-chip optical microcavity allows laser initiation of clusters of quasi–two-dimensional vortices and nondestructive observation of their decay in a single shot. Coherent dynamics dominate, with thermal vortex diffusion suppressed by five orders of magnitude. This establishes an on-chip platform with which to study emergent phenomena in strongly interacting superfluids and to develop quantum technologies such as precision inertial sensors.
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Дисертації з теми "Strongly interacting quantum systems"

1

Kasztelan, Christian. "Strongly Interacting Quantum Systems out of Equilibrium." Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-124827.

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2

Antonio, R. G. "Quantum computation and communication in strongly interacting systems." Thesis, University College London (University of London), 2015. http://discovery.ucl.ac.uk/1469437/.

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Each year, the gap between theoretical proposals and experimental endeavours to create quantum computers gets smaller, driven by the promise of fundamentally faster algorithms and quantum simulations. This occurs by the combination of experimental ingenuity and ever simpler theoretical schemes. This thesis comes from the latter perspective, aiming to find new, simpler ways in which components of a quantum computer could be built. We first search for ways to create quantum gates, the primitive building blocks of a quantum computer. We find a novel, low-control way of performing a two-qubit gate on qubits encoded in a decoherence-free subspace, making use of many-body interactions that may already be present. This includes an analysis of the effect of control errors and magnetic field fluctuations on the gate. We then present novel ways to create three-qubit Toffoli and Fredkin gates in a single step using linear arrays of qubits, including an assessment of how well these gates could perform, for quantum or classical computation, using state-of-the-art ion trap and silicon donor technology. We then focus on a very different model from the normal circuit model, combining ideas from measurement-based quantum computation (MBQC) and holonomic quantum computation. We generalise an earlier model to show that all MBQC patterns with a property called gflow can be converted into a holonomic computation. The manifestation of the properties of MBQC in this adiabatically driven model is then explored. Finally, we investigate ways in which quantum information can be communicated between distant parties, using minimally engineered spin chains. The viability of using 1D Wigner crystals as a quantum channel is analysed, as well as schemes using ideal uniform spin chains with nextneighbour interactions, and edge-locking effects.
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3

Thomson, Steven. "The effects of disorder in strongly interacting quantum systems." Thesis, University of St Andrews, 2016. http://hdl.handle.net/10023/9441.

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This thesis contains four studies of the effects of disorder and randomness on strongly correlated quantum phases of matter. Starting with an itinerant ferromagnet, I first use an order-by-disorder approach to show that adding quenched charged disorder to the model generates new quantum fluctuations in the vicinity of the quantum critical point which lead to the formation of a novel magnetic phase known as a helical glass. Switching to bosons, I then employ a momentum-shell renormalisation group analysis of disordered lattice gases of bosons where I show that disorder breaks ergodicity in a non-trivial way, leading to unexpected glassy freezing effects. This work was carried out in the context of ultracold atomic gases, however the same physics can be realised in dimerised quantum antiferromagnets. By mapping the antiferromagnetic model onto a hard-core lattice gas of bosons, I go on to show the importance of the non-ergodic effects to the thermodynamics of the model and find evidence for an unusual glassy phase known as a Mott glass not previously thought to exist in this model. Finally, I use a mean-field numerical approach to simulate current generation quantum gas microscopes and demonstrate the feasibility of a novel measurement scheme designed to measure the Edwards-Anderson order parameter, a quantity which describes the degree of ergodicity breaking and which has never before been experimentally measured in any strongly correlated quantum system. Together, these works show that the addition of disorder into strongly interacting quantum systems can lead to qualitatively new behaviour, triggering the formation of new phases and new physics, rather than simply leading to small quantitative changes to the physics of the clean system. They provide new insights into the underlying physics of the models and make direct connection with experimental systems which can be used to test the results presented here.
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4

Carleo, Giuseppe. "Spectral and dynamical properties of strongly correlated systems." Doctoral thesis, SISSA, 2011. http://hdl.handle.net/20.500.11767/4289.

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In the first part of the Thesis we mostly concentrate on spectral properties of strongly correlated systems and on their equilibrium properties. This is accomplished by the general concept of imaginary-time dynamics which we apply to a number of different problems in which different strengths of this approach emerge. In Chapter 1 we introduce the formalism that allows for a connection between the quantum and the classical worlds. The connection is established by means of the imaginary-time quantum evolution which, under certain circumstances, is shown to be equivalent to a classical stochastic process. It is further shown that exact static and spectral properties of correlated systems can be obtained when this mapping is feasible. The relationship between the imaginary-time dynamics in different frameworks such as the path-integral and the perturbative one is also underlined. In Chapter 2 we present a specific implementation of the general ideas previously presented. In particular we introduced an extension to lattice systems of the Reptation Monte Carlo algorithm [30] which benefits of a sampling scheme based on directed updates. Specific improvements over the existing methodologies consist in the unbiased evaluation of the imaginary-time path integrals for bosons and a systematic scheme to improve over the Fixed-node approximation for fermions. Applications to the Hubbard and the Heisenberg models are presented. In Chapter 3 we demonstrate the application of the imaginary-time dynamics to the exact study of spectral properties. Subject of our attention is a highly anharmonic and correlated quantum crystal such as Helium 4 at zero temperature.[33] Concerning this system, we have obtained the first ab-initio complete phonon dispersion in good agreement with neutron spectroscopy experiments. Moreover, we have also studied the density excitations of solid helium in a region of wave-vectors in between the collective (phonon) and the single-particle regimes, where the presence of residual coherence in the dynamics shows analogies between the highly anharmonic crystal and the superfluid phase. In Chapter 4 we introduce a novel method, based on the imaginary-time dynamics, to obtain unbiased estimates of fermionic properties.[34] By means of this method and of a very accurate variational state, we provide strong evidence for the stability of a saturated ferromagnetic phase in the high-density regime of the two-dimensional infinite-U Hubbard model. By decreasing the electron density, we observe a discontinuous transition to a paramagnetic phase, accompanied by a divergence of the susceptibility on the paramagnetic side. This behavior, resulting from a high degeneracy among different spin sectors, is consistent with an infinite-order phase transition scenario. In Chapter 5 the use of imaginary-time dynamics in the context of finite-temperature response functions is highlighted. As an application, we study an intriguing quantum phase featuring both glassy order and Bose-Einstein condensation. [35] We introduce and validate a model for the role of geometrical frustration in the coexistence of off-diagonal long range order with an amorphous density profile. The exact characterization of the response of the system to an external density perturbation is what allows here to establish the existence of a spin-glass phase. The differences between such a phase and the otherwise insulating "Bose glasses" are further elucidated in the Chapter. In the second part of the Thesis we focus our attention on the dynamics of closed systems out of equilibrium. This is accomplished by both non-stochastic exact methods for the dynamics and the introduction of a novel time-dependent Variational Monte Carlo scheme. In Chapter 6 exact diagonalization schemes and renormalization-based methods for one-dimensional systems are introduced. We identify key phenomenological traits resulting from the many-body correlation in closed systems driven sufficiently away from equilibrium.[31] We provide evidences that the dynamics of interacting lattice bosons away from equilibrium can be trapped into extremely long-lived inhomogeneous metastable states. The slowing down of incoherent density excitations above a threshold energy, much reminiscent of a dynamical arrest on the verge of a glass transition, is identified as the key feature of this phenomenon. In Chapter 7 we present an extension to dynamical properties of the Variational Quantum Monte Carlo method.[32] This is accomplished by introducing a general class of time-dependent variational states which is based on the mapping of the many-body dynamics onto an instantaneous ground-state problem. The application of the method to the experimentally relevant quantum quenches of interacting bosons reveals the accuracy and the reliability of the introduced numerical scheme. We indeed obtain for the first time a consistent variational description of the approach to the equilibrium of local observables and underline the origin of the metastability and glassy behavior previously identified. In the very last part we draw our conclusions and show some possible paths for stimulating future research.
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5

Akhanjee, Shimul. "Classical and quantum aspects of strongly interacting one-dimensional systems." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1679376391&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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Grover, Tarun Ph D. Massachusetts Institute of Technology. "Applied fractionalization : quantum phases and phase transitions of strongly interacting systems." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/68973.

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Анотація:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2010.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 131-136).
Strongly correlated systems present interesting challenges in condensed matter physics. On the one hand, the theoretical work in the last two decades suggests that strong interactions may lead to new phases and phase transitions of matter that don't fit paradigms such as Fermi liquid theory or Landau's theory of phase transitions. On the other hand, there are actual materials which are undoubtedly governed by strong interactions and indeed do not fit the conventional paradigms but whose behavior often doesn't quite match our theoretical expectations. This gap between theory and experiments is slowly narrowing owing to the discovery of new materials and recent advances in numerical simulations. As an example, the material K - (ET)2Cu 2(CN) 3 exhibits metallic specific heat in its insulating phase. This is indicative of the theoretically proposed phenomena of 'fractionalization' where elementary excitations in a phase carry quantum numbers that are fractions of that corresponding to an electron. Similarly, there is growing numerical evidence of the theoretical phenomena of 'deconfined quantum criticality', where quantum Berry phases lead to emergence of fractionalized particles right at the phase transition. In this thesis we study phenomena where the concept of fractionalization is a useful tool to explore new phases and phase transitions. Most of our examples are in the context of frustrated quantum magnets. Along the way, we also explore topics such as quantum numbers of topological defects and non-abelian phases of matter. Whenever possible, we compare theoretical predictions with experimental and numerical data. We also discuss deconfined quantum criticality in the context of metallic systems where it opens the route to phase transitions very different from the conventional spin-density wave instability of Fermi surface.
by Tarun Grover.
Ph.D.
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7

Yan, Mi. "Quantum Dynamics of Strongly-Interacting Bosons in Optical Lattices with Disorder." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/87432.

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Ultracold atoms in optical lattices offer an important tool for studying dynamics in many-body interacting systems in a pristine environment. This thesis focuses on three theoretical works motivated by recent optical lattice experiments. In the first, we theoretically study the center of mass dynamics of states derived from the disordered Bose-Hubbard model in a trapping potential. We find that the edge states in the trap allow center of mass motion even with insulating states in the center. We identify short and long-time mechanisms for edge state transport in insulating phases. We also argue that the center of mass velocity can aid in identifying a Bose-glass phase. Our zero temperature results offer important insights into mechanisms of transport of atoms in trapped optical lattices while putting bounds on center of mass dynamics expected at non-zero temperature. In the second work, we study the domain wall expansion dynamics of strongly interacting bosons in 2D optical lattices with disorder in a recent experiment {[}J.-y. Choi et al., Science 352, 1547 (2016)]. We show that Gutzwiller mean-field theory (GMFT) captures the main experimental observations, which are a result of the competition between disorder and interactions. Our findings highlight the difficulty in distinguishing glassy dynamics, which can be captured by GMFT, and many-body localization, which cannot be captured by GMFT, and indicate the need for further experimental studies of this system. The last work features our study of phase diagrams of the 2D Bose-Hubbard model in an optical lattice with synthetic spin-orbit coupling. We investigate the transitions between superfluids with different phase patterns, which may be detected by measuring the spin-dependent momentum distribution.
Ph. D.
Ultracold atoms in optical lattices, a periodic potential generated by laser beams, offer an important tool for quantum simulations in a pristine environment. Motivated by recent optical lattice experiments with the implementation of disorder and synthetic spin-orbit coupling, we utilize Gutzwiller mean-field theory (GMFT) to study the dynamics of disordered state in an optical lattice under the sudden shift of the harmonic trap, the domain wall expansion of strongly interacting bosons in 2D lattices with disorder, and spin-orbit-driven transitions in the Bose-Hubbard model. We argue that the center of mass velocity can aid in identifying a Bose-glass phase. Our findings show that evidence for many-body localization claimed in experiments [J.-y. Choi et al., Science 352, 1547 (2016)] must lie in the differences between GMFT and experiments. We also find that strong spin-orbit coupling alone can generate superfluids with finite momentum and staggered phase patterns.
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8

Shotter, Martin David. "The development of techniques to prepare and probe at single atom resolution strongly interacting quantum systems ot uitracold atoms." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526117.

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Romanovsky, Igor Alexandrovich. "Novel properties of interacting particles in small low-dimensional systems." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-07102006-041659/.

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Анотація:
Thesis (Ph. D.)--Physics, Georgia Institute of Technology, 2007.
Landman, Uzi, Committee Member ; Yannouleas, Constantine, Committee Member ; Bunimovich, Leonid, Committee Member ; Chou, Mei-Yin, Committee Member ; Pustilnik, Michael, Committee Member.
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Czischek, Stefanie [Verfasser], and Thomas [Akademischer Betreuer] Gasenzer. "Simulating Strongly Interacting Quantum Spin Systems–From Critical Dynamics Towards Entanglement Correlations in a Classical Artificial Neural Network / Stefanie Czischek ; Betreuer: Thomas Gasenzer." Heidelberg : Universitätsbibliothek Heidelberg, 2019. http://d-nb.info/119790431X/34.

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Книги з теми "Strongly interacting quantum systems"

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1938-, Arenhövel H., ed. Many body structure of strongly interacting systems: Refereed and selected contributions of the symposium "20 years of physics at the Mainz Microtron MAMI," Mainz, Germany, October 19-22, 2005. Bologna, Italy: Societá italiana di fisica, 2006.

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2

Cassing, Wolfgang. Transport Theories for Strongly-Interacting Systems. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80295-0.

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3

Salabura, Piotr. Vector mesons in strongly interacting systems. Kraków: Wydawn. Uniwersytetu Jagiellońskiego, 2003.

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4

Arenhövel, Hartmuth, Hartmut Backe, Dieter Drechsel, Jörg Friedrich, Karl-Heinz Kaiser, and Thomas Walcher, eds. Many Body Structure of Strongly Interacting Systems. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/3-540-36754-3.

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5

Kharzeev, Dmitri. Strongly Interacting Matter in Magnetic Fields. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013.

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6

Gabor, Kalman, Rommel J. Martin, Blagoev Krastan, and International Conference on Strongly Coupled Coulomb Systems (1997 : Boston College), eds. Strongly coupled coulomb systems. New York: Plenum Press, 1998.

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7

Kalman, Gabor, J. Martin Rommel, and Krastan Blagoev. Strongly coupled coulomb systems. New York: Kluwer Academic, 2002.

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8

Nozières, Philippe. Theory of interacting Fermi systems. Reading, Mass: Addison-Wesley, 1997.

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9

M, Tsvelik Alexei, North Atlantic Treaty Organization. Scientific Affairs Division., and NATO Advanced Study Institute on New Theoretical Approaches to Strongly Correlated Systems (1999 : Cambridge, UK), eds. New theoretical approaches to strongly correlated systems. Dordrecht: Kluwer Academic Publishers, 2001.

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10

José, Carmelo, ed. Strongly correlated systems, coherence and entanglement. Singapore: World Scientific, 2007.

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Частини книг з теми "Strongly interacting quantum systems"

1

Quinn, John J., and Kyung-Soo Yi. "The Fractional Quantum Hall Effect: The Paradigm for Strongly Interacting Systems." In UNITEXT for Physics, 497–520. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73999-1_16.

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2

Quinn, John J., and Kyung-Soo Yi. "The Fractional Quantum Hall Effect: The Paradigm for Strongly Interacting Systems." In Solid State Physics, 483–513. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-92231-5_16.

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3

Shaginyan, V. R. "Model of Strongly Correlated 2D Fermi Liquids Based on Fermion-Condensation Quantum Phase Transition." In Optical Properties of 2D Systems with Interacting Electrons, 259–77. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0078-9_22.

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4

Jiang, Yin, Xingyu Guo, and Pengfei Zhuang. "Quantum Kinetic Description of Spin and Rotation." In Strongly Interacting Matter under Rotation, 167–93. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71427-7_6.

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Will, Sebastian. "Towards Strongly Interacting Bosons and Fermions." In From Atom Optics to Quantum Simulation, 13–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33633-1_2.

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Ambruş, Victor E., and Elizabeth Winstanley. "Exact Solutions in Quantum Field Theory Under Rotation." In Strongly Interacting Matter under Rotation, 95–135. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71427-7_4.

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D’Hoker, Eric, and Per Kraus. "Quantum Criticality via Magnetic Branes." In Strongly Interacting Matter in Magnetic Fields, 469–502. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-37305-3_18.

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8

Becattini, Francesco. "Polarization in Relativistic Fluids: A Quantum Field Theoretical Derivation." In Strongly Interacting Matter under Rotation, 15–52. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71427-7_2.

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9

Faessler, A. "Quantum Chromodynamics and the Nucleon-Nucleon Interaction." In Phase Structure of Strongly Interacting Matter, 290–306. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-87821-3_12.

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10

Nishijima, Kazuhiko, Masud Chaichian, and Anca Tureanu. "Quantization of Interacting Systems." In Quantum Field Theory, 105–25. Dordrecht: Springer Netherlands, 2022. http://dx.doi.org/10.1007/978-94-024-2190-3_6.

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Тези доповідей конференцій з теми "Strongly interacting quantum systems"

1

Cox, Joel D. "Quantum emitters strongly interacting with nonlinear plasmonic near fields (Conference Presentation)." In Quantum Nanophotonic Materials, Devices, and Systems 2019, edited by Mario Agio, Cesare Soci, and Matthew T. Sheldon. SPIE, 2019. http://dx.doi.org/10.1117/12.2529489.

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2

Fukuzawa, T., S. Y. Kim, T. K. Gustafson, E. E. Haller, and E. Yamada. "Anomalous Diffusion of Repulsive Bosons in a Two-Dimensional Random Potential." In Quantum Optoelectronics. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/qo.1997.qthb.2.

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Анотація:
Two-dimensional (2D) bosons can undergo a Kosterlitz-Thouless transition[1], which does not involve macroscopic occupation of a single quantum state, but which can still result in superfluidity. In addition, strongly interacting bosons subject to a random potential can also exhibit superfluidity, as in the case of charged superfluidity that occurs in high-T c superconductors. Competition between the strength of the interaction and the degree of potential disorder are among the many complicated and competing factors which determine whether superfluidity is promoted or supressed in a Bose system[2]. Strong potential disorder forces bosons to localize and can result in an insulating Bose glass phase. Alternatively, repulsive interactions among bosons act to release them from their traps, to keep their inter-particle distances as uniform as the potential allows, and to arrange the flow direction. An appropriate interaction strength can thus promote superfluidity.
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3

Cappellini, Giacomo, Lorenzo F. Livi, Lorenzo Franchi, Jacopo Catani, Massimo Inguscio, and Leonardo Fallani. "Realization of strongly interacting Fermi gases and spin-orbit coupled systems with an optical clock transition." In 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE, 2017. http://dx.doi.org/10.1109/cleoe-eqec.2017.8087447.

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4

Karnieli, Aviv, Shai Tsesses, Renwen Yu, Nicholas Rivera, Zhexin Zhao, Ady Arie, Shanhui Fan, and Ido Kaminer. "Probing strongly coupled light-matter interactions using quantum free electrons." In CLEO: QELS_Fundamental Science. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_qels.2022.fth5l.4.

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We propose to use free-electrons as quantum probes of strongly coupled light-matter systems. Interactions with such systems are distinctly imprinted on the electron energy spectrum, allowing for quantum detection and new photon blockade mechanisms.
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5

Sandvik, A. W. "Valence-bond-solid phases and quantum phase transitions in two-dimensional spin models with four-site interactions." In EFFECTIVE MODELS FOR LOW-DIMENSIONAL STRONGLY CORRELATED SYSTEMS. AIP, 2006. http://dx.doi.org/10.1063/1.2178047.

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6

Kimble, H. J., G. Rempe, and R. J. Thompson. "Optical Physics with Finesse - Dissipative Quantum Dynamics for Atoms in a Cavity with R=0.9999984." In Nonlinear Optics. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/nlo.1992.tua2.

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While for the most part quantum statistical processes in quantum optics are investigated in a weak coupling regime, it has recently become possible to realize experimentally optical systems for which the internal coupling coefficient g is comparable to the external dissipative rates. Within this context the subject of our investigation is the quantum dynamical processes for a collection of N two-state atoms strongly coupled to a single mode of a high finesse optical cavity, Our particular experiment consists of a small collection of Cesium atoms (6S1/2, F = 4 → 6P3/2, F = 5 transition at 852nm) interacting with the TEM00 mode of a spherical mirror cavity. The critical technical advance for this work is the attainment of extremely low loss mirrors for high finesse (103 – 106) and hence long photon lifetime even in a small cavity.[1]
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7

Kaplan, A. E. "Quantum Stairs and Multi-Rabi Chaos in a Driven Anharmonic Oscillator." In Nonlinear Dynamics in Optical Systems. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/nldos.1990.oc510.

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A single magnetized electron driven by the EM wave in the vicinity of the cyclotron frequency can exhibit large hysteretic resonance caused by a tiny relativistic change of its mass [1]. Consistent with the theory [1] this effect has recently been observed in experiment [2]. The theory of this most fundamental multi-stable interaction of light with matter can be developed using a simple model of a quantum anharmonic oscillator driven by a periodic force. Making a common assumption that quantum transitions occur only between neighboring slightly-nonequidistant eigenstates of the oscillator, one can describe the dynamics of the system by infinite number of coupled kinetic equations for the density matrix elements at each eigenstate. We found that the reaction of the system (expressed in the terms of expectation energy of excitation) dramatically depends on the speed of sweeping frequency of the driving force near the cyclotron resonance. If the driving frequency is swept downward infinitesimally slow and no dissipation is present, the system’s response shows strongly pronounced train of "quantum stairs" at the raising slope of the function "energy vs. driving frequency" (Fig. 1) starting at the main (cyclotron) frequency Ωr which is a resonant frequency of the unperturbed (i.e. harmonic) oscillator. The height of each of these stairs is ħΩr and they are equidistantly spaced by ΔΩsp = Ωn−Ωn−1 such that ΔΩsp/Ωr = ħΩr/moc2 = krre/α, where kr = Ωr/c, re = e2/moc2 is a classical electron radius, and α = e2/ħc = 1/137 is a fine structure constant; e.g., at λr = 2mm, ΔΩsp = 180.76 Hz. The stair of each consequent order n can be interpreted as an adiabaticly slow Landau-Zenner transition between (n-1)th and n-th excited level respectively. However, when the frequency sweeping is sufficiently fast, these transitions become oscillatory with the oscillations at each one of them being due to a Rabi frequency pertinent to that individual transition. Since all of them are coupled and since due to the anharmonicity all the Rabi oscillations form an infinite set of incommensurate frequencies, these oscillations evolve into strongly chaotic motion (Fig. 2). These quantum effects are universal and should exist in any anharmonic oscillator as long as its anharmonicity is much stronger than dissipation, i.e. when ΔΩspτ ≫ 1, where τ is relaxation time of the system (for a single cyclotron electron with its energy dissipation attributed to the synchrotron radiation, ΔΩspτ = 3/2α = 205.5). This work is supported by AFOSR.
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8

Kimble, J. J., R. J. Brecha, R. J. Thompson, and W. D. Lee. "Photon statistics for two-state atoms in an optical cavity." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.ws2.

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Анотація:
While for the most part quantum statistical processes in quantum optics are investigated in a weak-coupling regime, it has recently become possible to realize experimentally systems for which the internal coupling coefficient g is comparable to the external dissipative rates. Within this context the subject of our investigation is the quantum dynamical processes for a collection of N two-state atoms strongly coupled to a single mode of a high finesse optical cavity. Our particular system consists of a collection of N~20 Cesium atoms (6S 1/2, f = 4– > 6P 3/2, f = 5 transition at 852 nm) interacting with the TEMoo mode of a spherical mirror cavity of finesse 4 × 104. Of principal importance are the single atom cooperativity parameter C1 = g 2/κγ and the saturation photon number no = g2/8γ 2, where (κ,γ) are the cavity and atomic decay rates. For our system, c1~1 and n0~0.5. In measurements of the joint probability of photoelectric detection we observe photon antibunching and sub-Poissonian photon statistics.1,2 An interpretation of our results in terms of quantum state reduction and interference in a dissipative dynamical setting is presented.2 We emphasize the decisive role played by the quantum fluctuations of a single atom (c1~1), which can result in a field of large variance even in the presence of N>1 atoms.
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9

Hu, Hui, Xia-Ji Liu, and Peter D. Drummond. "Strongly Interacting Polarized Fermi Gases." In Quantum-Atom Optics Downunder. Washington, D.C.: OSA, 2007. http://dx.doi.org/10.1364/qao.2007.qme21.

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10

Kuhl, J., A. Honold, L. Schultheis, and C. W. Tu. "Enhancement of the Radiative Lifetime of 2D Excitons in a GaAs Quantum Well by Dephasing Collisions." In Quantum Wells for Optics and Opto-Electronics. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/qwoe.1989.mc3.

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The nonlinear optical properties and the ultrafast dynamics of excitons in semiconductors are a major field of present semiconductor research. This interest is explained by the potential applications of excitonic nonlinearities as ultrafast optical switching devices in future optical communication systems. In a recent theoretical paper Hanamura /1/ discussed the advantages of excitons in a quantum well (QW) as a nonliner optical medium combining large 3rd order nonlinear susceptibility χ(3) with a fast response. The strong enhancement of is χ(3) explained as a consequence of both the macroscopic transition dipole moment of the exciton in a QW and the rapid radiative decay of the confined excitons. Hanamura calculated that an exciton in a QW should decay superradiantly through its macroscopic dipole transition moment within a few picoseconds. This superradiant decay requires, however, a coherent polarization of the material and will be strongly reduced if the spatial and temporal coherence of the excited excitons is destroyed by interaction of the excitons with their environment. Such a tight connection between the radiative lifetime τ r and the dephasing T2 has been recently predicted by Feldmann et al. /2/.
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Звіти організацій з теми "Strongly interacting quantum systems"

1

Wilkins, J. Strongly interacting fermion systems. Office of Scientific and Technical Information (OSTI), January 1990. http://dx.doi.org/10.2172/6745929.

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2

Wilkins, J. W. Final Report of Strongly Interacting Fermion Systems. Office of Scientific and Technical Information (OSTI), June 2001. http://dx.doi.org/10.2172/836268.

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3

Wilkins, J. Strongly interacting fermion systems: Technical progress report. Office of Scientific and Technical Information (OSTI), May 1989. http://dx.doi.org/10.2172/6246658.

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4

Nishida, Yusuke. Universality in strongly correlated quantum systems. Office of Scientific and Technical Information (OSTI), November 2012. http://dx.doi.org/10.2172/1056524.

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5

Douglas J. Scalapino and Robert L. Sugar. Competing Phases and Basic Mechanisms in Strongly-interacting Electron Systems. Office of Scientific and Technical Information (OSTI), January 2006. http://dx.doi.org/10.2172/862360.

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6

Mottola, E., T. Bhattacharya, and F. Cooper. Phase transitions, nonequilibrium dynamics, and critical behavior of strongly interacting systems. Office of Scientific and Technical Information (OSTI), December 1998. http://dx.doi.org/10.2172/560790.

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7

Quinn, John. Final Report - Composite Fermion Approach to Strongly Interacting Quasi Two Dimensional Electron Gas Systems. Office of Scientific and Technical Information (OSTI), November 2009. http://dx.doi.org/10.2172/1054786.

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8

Gagliardi, Laura. Quantum Chemical Treatment of Strongly Correlated Magnetic Systems Based on Heavy Elements. Office of Scientific and Technical Information (OSTI), May 2022. http://dx.doi.org/10.2172/1868929.

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9

Chang, C. Auxiliary-Field Quantum Monte Carlo Simulations of Strongly-Correlated Systems, the Final Report. Office of Scientific and Technical Information (OSTI), November 2017. http://dx.doi.org/10.2172/1409928.

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10

Gurevitz, Michael, William A. Catterall, and Dalia Gordon. Learning from Nature How to Design Anti-insect Selective Pesticides - Clarification of the Interacting Face between Insecticidal Toxins and their Na-channel Receptors. United States Department of Agriculture, January 2010. http://dx.doi.org/10.32747/2010.7697101.bard.

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Structural details on the interacting faces of toxins and sodium channels (Navs), and particularly identification of elements that confer specificity for insects, are difficult to approach and require suitable experimental systems. Therefore, natural toxins capable of differential recognition of insect and mammalian Navs are valuable leads for design of selective compounds in insect control. We have characterized several scorpion toxins that vary in preference for insect and mammalian Navs, and identified residues important for their action. However, despite many efforts worldwide, only little is known about the receptor sites of these toxins, and particularly on differences between these sites on insect and mammalian Navs. Another problem arises from the massive overuse of chemical insecticides, which increases resistance buildup among various insect pests. A possible solution to this problem is to combine different insecticidal compounds, especially those that provide synergic effects. Our recent finding that combinations of insecticidal receptor site-3 toxins (sea anemone and scorpion alpha) with scorpion beta toxins or their truncated derivatives are synergic in toxicity to insects is therefore timely and strongly supports this approach. Our ability to produce toxins and various Navs in recombinant forms, enable thorough analysis and structural manipulations of both toxins and receptors. On this basis we propose to (1) restrict by mutagenesis the activity of insecticidal scorpion -toxins and sea anemone toxins to insects, and clarify the molecular basis of their synergic toxicity with antiinsect selective -toxins; (2) identify Nav elements that interact with scorpion alpha and sea anemone toxins and those that determine toxin selectivity to insects; (3) determine toxin-channel pairwise side-chain interactions by thermodynamic mutant cycle analysis using our large collection of mutant -toxins and Nav mutants identified in aim 2; (4) clarify the mode of interaction of truncated -toxins with insect Navs, and elucidate how they enhance the activity of insecticidal site-3 toxins. This research may lead to rational design of novel anti-insect peptidomimetics with minimal impact on human health and the environment, and will establish the grounds for a new strategy in insect pest control, whereby a combination of allosterically interacting compounds increase insecticidal action and reduce risks of resistance buildup.
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