Relevant bibliographies by topics / Truncated Wigner

Academic literature on the topic 'Truncated Wigner'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

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Journal articles on the topic "Truncated Wigner"

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Klimov, A. B., I. Sainz, and J. L. Romero. "Truncated Wigner approximation as non-positive Kraus map." Physica Scripta 95, no. 7 (May 18, 2020): 074006. http://dx.doi.org/10.1088/1402-4896/ab8d53.

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Weber, T. A., and D. L. Pursey. "Scattering from a truncated von Neumann–Wigner potential." Physical Review A 57, no. 5 (May 1, 1998): 3534–45. http://dx.doi.org/10.1103/physreva.57.3534.

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Wurtz, Jonathan, Anatoli Polkovnikov, and Dries Sels. "Cluster truncated Wigner approximation in strongly interacting systems." Annals of Physics 395 (August 2018): 341–65. http://dx.doi.org/10.1016/j.aop.2018.06.001.

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Lang, Haifeng, Oriol Vendrell, and Philipp Hauke. "Generalized discrete truncated Wigner approximation for nonadiabatic quantum-classical dynamics." Journal of Chemical Physics 155, no. 2 (July 14, 2021): 024111. http://dx.doi.org/10.1063/5.0054696.

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Dujardin, Julien, Thomas Engl, Juan Diego Urbina, and Peter Schlagheck. "Describing many-body bosonic waveguide scattering with the truncated Wigner method." Annalen der Physik 527, no. 9-10 (September 29, 2015): 629–38. http://dx.doi.org/10.1002/andp.201500113.

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Sinatra, Alice, Carlos Lobo, and Yvan Castin. "The truncated Wigner method for Bose-condensed gases: limits of validity and applications." Journal of Physics B: Atomic, Molecular and Optical Physics 35, no. 17 (August 21, 2002): 3599–631. http://dx.doi.org/10.1088/0953-4075/35/17/301.

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Maruo, Daiki, Shoko Utsunomiya, and Yoshihisa Yamamoto. "Truncated Wigner theory of coherent Ising machines based on degenerate optical parametric oscillator network." Physica Scripta 91, no. 8 (July 26, 2016): 083010. http://dx.doi.org/10.1088/0031-8949/91/8/083010.

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Morales-Hernández, Giovani E., Juan C. Castellanos, José L. Romero, and Andrei B. Klimov. "Semi-Classical Discretization and Long-Time Evolution of Variable Spin Systems." Entropy 23, no. 6 (May 28, 2021): 684. http://dx.doi.org/10.3390/e23060684.

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We apply the semi-classical limit of the generalized SO(3) map for representation of variable-spin systems in a four-dimensional symplectic manifold and approximate their evolution terms of effective classical dynamics on T*S2. Using the asymptotic form of the star-product, we manage to “quantize” one of the classical dynamic variables and introduce a discretized version of the Truncated Wigner Approximation (TWA). Two emblematic examples of quantum dynamics (rotor in an external field and two coupled spins) are analyzed, and the results of exact, continuous, and discretized versions of TWA are compared.
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Tylutki, Marek, Jacek Dziarmaga, and Wojciech H. Zurek. "Dynamics of the Mott Insulator to Superfluid quantum phase transition in the truncated Wigner approximation." Journal of Physics: Conference Series 414 (February 8, 2013): 012029. http://dx.doi.org/10.1088/1742-6596/414/1/012029.

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Verstraelen, Wouter, and Michiel Wouters. "Gaussian Quantum Trajectories for the Variational Simulation of Open Quantum-Optical Systems." Applied Sciences 8, no. 9 (August 21, 2018): 1427. http://dx.doi.org/10.3390/app8091427.

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We construct a class of variational methods for the study of open quantum systems based on Gaussian ansatzes for the quantum trajectory formalism. Gaussianity in the conjugate position and momentum quadratures is distinguished from Gaussianity in density and phase. We apply these methods to a driven-dissipative Kerr cavity where we study dephasing and the stationary states throughout the bistability regime. Computational cost proves to be similar to the Truncated Wigner Approximation (TWA) method, with at most quadratic scaling in system size. Meanwhile, strong correspondence with the numerically-exact trajectory description is maintained so that these methods contain more information on the ensemble constitution than TWA and can be more robust.
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Dissertations / Theses on the topic "Truncated Wigner"

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Nagao, Kazuma. "Fluctuations and non-equilibrium phenomena in strongly-correlated ultracold atoms." Kyoto University, 2019. http://hdl.handle.net/2433/242588.

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Wuester, Sebastian, and sebastian wuester@gmx net. "Classical and Quantum Field Theory of Bose-Einstein Condensates." The Australian National University. Faculty of Science, 2007. http://thesis.anu.edu.au./public/adt-ANU20070802.161045.

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We study the application of Bose-Einstein condensates (BECs) to simulations of phenomena across a number of disciplines in physics, using theoretical and computational methods. ¶ Collapsing condensates as created by E. Donley et al. [Nature 415, 39 (2002)] exhibit potentially useful parallels to an inflationary universe. To enable the exploitation of this analogy, we check if current quantum field theories describe collapsing condensates quantitatively, by targeting the discrepancy between experimental and theoretical values for the time to collapse. To this end, we couple the lowest order quantum field correlation functions to the condensate wavefunction, and solve the resulting Hartree-Fock-Bogoliubov equations numerically. Complementarily, we perform stochastic truncated Wigner simulations of the collapse. Both methods also allow us to study finite temperature effects. ¶ We find with neither method that quantum corrections lead to a faster collapse than is predicted by Gross-Pitaevskii theory. We conclude that the discrepancy between the experimental and theoretical values of the collapse time cannot be explained by Gaussian quantum fluctuations or finite temperature effects. Further studies are thus required before the full analogue cosmology potential of collapsing condensates can be utilised. ¶ As the next project, we find experimental parameter regimes in which stable three-dimensional Skyrmions can exist in a condensate. We show that their stability in a harmonic trap depends critically on scattering lengths, atom numbers, trap rotation and trap anisotropy. In particular, for the Rb87 |F=1,m_f=-1>, |F=2,m_f=1> hyperfine states, stability is sensitive to the scattering lengths at the 2% level. We find stable Skyrmions with slightly more than 2*10^6 atoms, which can be stabilised against drifting out of the trap by laser pinning. ¶ As a stepping stone towards Skyrmions, we propose a method for the stabilisation of a stack of parallel vortex rings in a Bose-Einstein condensate. The method makes use of a ``hollow'' laser beam containing an optical vortex, which realises an optical tunnel for the condensate. Using realistic experimental parameters, we demonstrate numerically that our method can stabilise up to 9 vortex rings. ¶ Finally, we focus on analogue gravity, further exploiting the analogy between flowing condensates and general relativistic curved space time. We compare several realistic setups, investigating their suitability for the observation of analogue Hawking radiation. We link our proposal of stable ring flows to analogue gravity, by studying supersonic flows in the optical tunnel. We show that long-living immobile condensate solitons generated in the tunnel exhibit sonic horizons, and discuss whether these could be employed to study extreme cases in analogue gravity. ¶ Beyond these, our survey indicates that for conventional analogue Hawking radiation, simple outflow from a condensate reservoir, in effectively one dimension, has the best properties. We show with three dimensional simulations that stable sonic horizons exist under realistic conditions. However, we highlight that three-body losses impose limitations on the achievable analogue Hawking temperatures. These limitations vary between the atomic species and favour light atoms. ¶ Our results indicate that Bose-Einstein condensates will soon be useful for interdisciplinary studies by analogy, but also show that the experiments will be challenging.
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Book chapters on the topic "Truncated Wigner"

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Czischek, Stefanie. "Discrete Truncated Wigner Approximation." In Springer Theses, 85–109. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52715-0_4.

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Wouters, Michiel, and Vincenzo Savona. "Truncated Wigner Approximation for Nonequilibrium Polariton Quantum Fluids." In Exciton Polaritons in Microcavities, 267–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-24186-4_10.

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Ruostekoski, Janne, and Andrew D. Martin. "The Truncated Wigner Method for Bose Gases." In Cold Atoms, 203–14. IMPERIAL COLLEGE PRESS, 2013. http://dx.doi.org/10.1142/9781848168121_0013.

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Conference papers on the topic "Truncated Wigner"

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Bastiaans, Martin J. "Wigner distribution function of circularly truncated light beams." In Selected Papers from the International Conference on Optics and Optoelectronics, edited by Kehar Singh, Om P. Nijhawan, Arun K. Gupta, and A. K. Musla. SPIE, 1999. http://dx.doi.org/10.1117/12.346769.

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Schachenmayer, Johannes. "Exploring Quantum Many-Body Spin Dynamics with Truncated Wigner Methods." In Latin America Optics and Photonics Conference. Washington, D.C.: OSA, 2016. http://dx.doi.org/10.1364/laop.2016.ltu5b.4.

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Reports on the topic "Truncated Wigner"

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Tylutki, Marek, Wojciech H. Zurek, and Jacek Dziarmaga. Dynamics of the Mott to superfluid quantum phase transition in the truncated Wigner approximation. Office of Scientific and Technical Information (OSTI), December 2012. http://dx.doi.org/10.2172/1057612.

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