Articoli di riviste: "Quantum electrodynamics"

1

Crenshaw, Michael E. "Quantum electrodynamic foundations of continuum electrodynamics". Physics Letters A 336, n. 2-3 (marzo 2005): 106–11. http://dx.doi.org/10.1016/j.physleta.2004.12.081.

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Boyer, Timothy. "Stochastic Electrodynamics: The Closest Classical Approximation to Quantum Theory". Atoms 7, n. 1 (1 marzo 2019): 29. http://dx.doi.org/10.3390/atoms7010029.

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Stochastic electrodynamics is the classical electrodynamic theory of interacting point charges which includes random classical radiation with a Lorentz-invariant spectrum whose scale is set by Planck’s constant. Here, we give a cursory overview of the basic ideas of stochastic electrodynamics, of the successes of the theory, and of its connections to quantum theory.

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Kinoshita, T., e Stanley J. Brodsky. "Quantum Electrodynamics". Physics Today 45, n. 8 (agosto 1992): 68–69. http://dx.doi.org/10.1063/1.2809775.

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SIVASUBRAMANIAN, S., A. WIDOM e Y. N. SRIVASTAVA. "RADIATIVE PHASE TRANSITIONS AND CASIMIR EFFECT INSTABILITIES". Modern Physics Letters B 20, n. 22 (30 settembre 2006): 1417–25. http://dx.doi.org/10.1142/s0217984906011748.

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Molecular quantum electrodynamics lead to photon frequency shifts and thus to changes in condensed matter free energies (often called the Casimir effect). Strong quantum electrodynamic coupling between radiation and molecular motions can lead to an instability beyond which one or more photon oscillators undergo a displacement phase transition. We show that the phase boundary of the transition can be located by a Casimir free energy instability.

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Rebhan, Anton, e Günther Turk. "Polarization effects in light-by-light scattering: Euler–Heisenberg versus Born–Infeld". International Journal of Modern Physics A 32, n. 10 (6 aprile 2017): 1750053. http://dx.doi.org/10.1142/s0217751x17500531.

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The angular dependence of the differential cross-section of unpolarized light-by-light scattering summed over final polarizations is the same in any low-energy effective theory of quantum electrodynamics and also in Born–Infeld electrodynamics. In this paper, we derive general expressions for polarization-dependent low-energy scattering amplitudes, including a hypothetical parity-violating situation. These are evaluated for quantum electrodynamics with charged scalar or spinor particles, which give strikingly different polarization effects. Ordinary quantum electrodynamics is found to exhibit rather intricate polarization patterns for linear polarizations, whereas supersymmetric quantum electrodynamics and Born–Infeld electrodynamics give particularly simple forms.

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Bacelar Valente, Mario. "The Relation between Classical and Quantum Electrodynamics". THEORIA 26, n. 1 (24 febbraio 2011): 51–68. http://dx.doi.org/10.1387/theoria.754.

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Quantum electrodynamics presents intrinsic limitations in the description of physical processes that make it impossible to recover from it the type of description we have in classical electrodynamics. Hence one cannot consider classical electrodynamics as reducing to quantum electrodynamics and being recovered from it by some sort of limiting procedure. Quantum electrodynamics has to be seen not as an more fundamental theory, but as an upgrade of classical electrodynamics, which permits an extension of classical theory to the description of phenomena that, while being related to the conceptual framework of the classical theory, cannot be addressed from the classical theory.

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Ciccarello, Francesco, Peter Lodahl e Dominik Schneble. "Waveguide Quantum Electrodynamics". Optics and Photonics News 35, n. 1 (1 gennaio 2024): 34. http://dx.doi.org/10.1364/opn.35.1.000034.

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Engineering photon–emitter interactions in 1D—using a suite of tools ranging from photonic-crystal waveguides to quantum dots to ultracold atoms in optical lattices-is opening intriguing experimental and practical opportunities in quantum information science and technology.

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Fabiano, Nicola. "Quantum electrodynamics divergencies". Vojnotehnicki glasnik 69, n. 3 (2021): 656–75. http://dx.doi.org/10.5937/vojtehg69-30366.

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Introduction/purpose: The problem of divergencies in Quantum Electrodynamics (QED) is discussed. Methods: The renormalisation group method is employed for dealing with infinities in QED. Results: The integrals in QED giving physical observables are finite. Conclusions: The divergencies in QED can be treated in a consistent way providing mathematical rigorous results.

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Land, Martin, e Lawrence P. Horwitz. "Offshell quantum electrodynamics". Journal of Physics: Conference Series 437 (22 aprile 2013): 012011. http://dx.doi.org/10.1088/1742-6596/437/1/012011.

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Riek, C., P. Sulzer, M. Seeger, A. S. Moskalenko, G. Burkard, D. V. Seletskiy e A. Leitenstorfer. "Subcycle quantum electrodynamics". Nature 541, n. 7637 (gennaio 2017): 376–79. http://dx.doi.org/10.1038/nature21024.

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11

Eberly, J. H. "Cavity Quantum Electrodynamics". American Journal of Physics 64, n. 2 (febbraio 1996): 189–90. http://dx.doi.org/10.1119/1.18423.

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Haroche, Serge, e Jean-Michel Raimond. "Cavity Quantum Electrodynamics". Scientific American 268, n. 4 (aprile 1993): 54–62. http://dx.doi.org/10.1038/scientificamerican0493-54.

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Walther, Herbert, Benjamin T. H. Varcoe, Berthold-Georg Englert e Thomas Becker. "Cavity quantum electrodynamics". Reports on Progress in Physics 69, n. 5 (3 aprile 2006): 1325–82. http://dx.doi.org/10.1088/0034-4885/69/5/r02.

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14

Haroche, Serge, e Daniel Kleppner. "Cavity Quantum Electrodynamics". Physics Today 42, n. 1 (gennaio 1989): 24–30. http://dx.doi.org/10.1063/1.881201.

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15

Malyuta, Yu M. "Topological quantum electrodynamics". Ukrainian Mathematical Journal 43, n. 11 (novembre 1991): 1448–49. http://dx.doi.org/10.1007/bf01067285.

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16

Schweber, Sam. "Early Quantum Electrodynamics". Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 26, n. 2 (agosto 1995): 201–11. http://dx.doi.org/10.1016/1355-2198(95)00011-9.

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Ciccarello, Francesco, Peter Lodahl e Dominik Schneble. "Waveguide Quantum Electrodynamics". Optics and Photonics News 35, n. 5 (1 maggio 2024): 34. http://dx.doi.org/10.1364/opn.35.5.000034.

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18

Loudon, R. "Quantum Electrodynamics and Quantum Optics". Optica Acta: International Journal of Optics 32, n. 11 (novembre 1985): 1315. http://dx.doi.org/10.1080/713821666.

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Keller, Ole, e Lee M. Hively. "Electrodynamics in curved space-time: Free-space longitudinal wave propagation". Physics Essays 32, n. 3 (11 settembre 2019): 282–91. http://dx.doi.org/10.4006/0836-1398-32.3.282.

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Jiménez and Maroto [Phys. Rev. D 83, 023514 (2011)] predicted free-space, longitudinal electrodynamic waves in curved space-time, if the Lorenz condition is relaxed. A general-relativistic extension of Woodside’s electrodynamics [Am. J. Phys. 77, 438 (2009)] includes a dynamical, scalar field in both the potential- and electric/magnetic-field formulations without mixing the two. We formulate a longitudinal-wave theory, eliminating curvature polarization, magnetization density, and scalar field in favor of the electric/magnetic fields and the metric tensor. We obtain a wave equation for the longitudinal electric field for a spatially flat, expanding universe with a scale factor. This work is important, because: (i) the scalar- and longitudinal-fields do not cancel, as in classical quantum electrodynamics; and (ii) this new approach provides a first-principles path to an extended quantum theory that includes acceleration and gravity.

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WIDOM, A., e Y. N. SRIVASTAVA. "QUANTUM FLUID MECHANICS AND QUANTUM ELECTRODYNAMICS". Modern Physics Letters B 04, n. 01 (10 gennaio 1990): 1–8. http://dx.doi.org/10.1142/s0217984990000027.

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The commutation relations of Landau quantum fluid mechanics are compared with those of quantum electrodynamics. In both cases, the operator representation of the commutators require a macroscopic phase, and a wavefunction periodic in that phase. A physical discussion is given for analogous effects in superfluids and superconductors, with regard to quantum coherence on a macroscopic scale. Other applications are then briefly described.

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Toms, David J. "Quantum gravitational contributions to quantum electrodynamics". Nature 468, n. 7320 (novembre 2010): 56–59. http://dx.doi.org/10.1038/nature09506.

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Kiraz, A., C. Reese, B. Gayral, Lidong Zhang, W. V. Schoenfeld, B. D. Gerardot, P. M. Petroff, E. L. Hu e A. Imamoglu. "Cavity-quantum electrodynamics with quantum dots". Journal of Optics B: Quantum and Semiclassical Optics 5, n. 2 (26 febbraio 2003): 129–37. http://dx.doi.org/10.1088/1464-4266/5/2/303.

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Akhmeteli, Andrey. "Some Classical Models of Particles and Quantum Gauge Theories". Quantum Reports 4, n. 4 (3 novembre 2022): 486–508. http://dx.doi.org/10.3390/quantum4040035.

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The article contains a review and new results of some mathematical models relevant to the interpretation of quantum mechanics and emulating well-known quantum gauge theories, such as scalar electrodynamics (Klein–Gordon–Maxwell electrodynamics), spinor electrodynamics (Dirac–Maxwell electrodynamics), etc. In these models, evolution is typically described by modified Maxwell equations. In the case of scalar electrodynamics, the scalar complex wave function can be made real by a gauge transformation, the wave function can be algebraically eliminated from the equations of scalar electrodynamics, and the resulting modified Maxwell equations describe the independent evolution of the electromagnetic field. Similar results were obtained for spinor electrodynamics. Three out of four components of the Dirac spinor can be algebraically eliminated from the Dirac equation, and the remaining component can be made real by a gauge transformation. A similar result was obtained for the Dirac equation in the Yang–Mills field. As quantum gauge theories play a central role in modern physics, the approach of this article may be sufficiently general. One-particle wave functions can be modeled as plasma-like collections of a large number of particles and antiparticles. This seems to enable the simulation of quantum phase-space distribution functions, such as the Wigner distribution function, which are not necessarily non-negative.

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Hays, M., V. Fatemi, D. Bouman, J. Cerrillo, S. Diamond, K. Serniak, T. Connolly et al. "Coherent manipulation of an Andreev spin qubit". Science 373, n. 6553 (22 luglio 2021): 430–33. http://dx.doi.org/10.1126/science.abf0345.

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Two promising architectures for solid-state quantum information processing are based on electron spins electrostatically confined in semiconductor quantum dots and the collective electrodynamic modes of superconducting circuits. Superconducting electrodynamic qubits involve macroscopic numbers of electrons and offer the advantage of larger coupling, whereas semiconductor spin qubits involve individual electrons trapped in microscopic volumes but are more difficult to link. We combined beneficial aspects of both platforms in the Andreev spin qubit: the spin degree of freedom of an electronic quasiparticle trapped in the supercurrent-carrying Andreev levels of a Josephson semiconductor nanowire. We performed coherent spin manipulation by combining single-shot circuit–quantum-electrodynamics readout and spin-flipping Raman transitions and found a spin-flip time TS = 17 microseconds and a spin coherence time T2E = 52 nanoseconds. These results herald a regime of supercurrent-mediated coherent spin-photon coupling at the single-quantum level.

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EFREMOV, G. F., V. V. SHARKOV e D. V. KRUPENNIKOV. "NONDIVERGENT STATISTICAL QUANTUM ELECTRODYNAMICS". International Journal of Bifurcation and Chaos 18, n. 09 (settembre 2008): 2817–24. http://dx.doi.org/10.1142/s0218127408022056.

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Quantum space-time nonlocality, i.e. retardation of the interaction between an electron and its own radiation field at distances about the Compton wavelength, is established. By taking into account a finite variance of electron-coordinate increment in the intrinsic coordinate system, the radiative damping coefficient is obtained as a divergence-free function of frequency that is not subject to the well-known paradoxes of the classical theory of radiative damping. A relation between radiative damping and the electromagnetic mass of the electron is found.

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Wright, Alison. "Shift to quantum electrodynamics". Nature Physics 4, n. 7 (luglio 2008): 518. http://dx.doi.org/10.1038/nphys1004.

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Bender, Carl M., Ines Cavero-Pelaez, Kimball A. Milton e K. V. Shajesh. "PT-symmetric quantum electrodynamics". Physics Letters B 613, n. 1-2 (aprile 2005): 97–104. http://dx.doi.org/10.1016/j.physletb.2005.03.032.

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Krasnikov, N. V., e N. A. Tavkhelidze. "Ultraviolet-finite quantum electrodynamics". Theoretical and Mathematical Physics 79, n. 3 (giugno 1989): 595–600. http://dx.doi.org/10.1007/bf01016544.

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29

Baumann, K. "On Bohm’s quantum electrodynamics". Il Nuovo Cimento B Series 11 96, n. 1 (novembre 1986): 21–25. http://dx.doi.org/10.1007/bf02725575.

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Fittler, Robert. "Asymptotic nonstandard quantum electrodynamics". Journal of Mathematical Physics 34, n. 5 (maggio 1993): 1692–724. http://dx.doi.org/10.1063/1.530184.

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31

Griffin, James J. "Quadronium and quantum electrodynamics". Canadian Journal of Physics 74, n. 7-8 (1 luglio 1996): 527–33. http://dx.doi.org/10.1139/p96-076.

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The composite-particle scenario is a phenomenology that can organize the data of the "sharp lepton problem" posed by heavy-ion and (β+ + atom) studies. It hypothesizes a new composite particle (of mass ~3mc2) as the source of the observed sharp energy (e+e−) decay pairs. Available data rule out the possibilities that the source is a new elementary particle or that it is a quasi-bound state of (e+e−). Occam's razor therefore currently favors the quadronium structure, Q0 = (e+e+e−e−). Implications of quadronium for high-precision quantum electrodynamics (QED) are considered, and calculated and (or) measured deviations in QED that are sensitive to the existence of Q0 are identified. In particular, for the electron magnetic-moment anomaly, a(e) = (ge − 2)/2, a Q0–pole effects a small correction to the contributions of O(α4), which is therefore small compared to the largest current (theoretical) uncertainty. For photon–photon scattering, Q0 corrects the leading order matrix element, and allows resonant Q0 creation in photon–nucleus scattering. Finally, a Q0 bound state corrects the O(α) correction to the leading 3γ annihilation rate of triplet positronium. Therefore Q0 may contribute significantly to this decay rate, which is currently in a 10σ discrepancy with experiment. A current experimental gap is the lack of corroborative data on the sharp (Γ ≤ 2.1 keV) 330.1 keV electrons reported by Sakai from irradiations of U and Th with β+-decay positrons. A study of these (and (or) their expected partner positrons of the same energy) in collisions of (~3 MeV) beam positrons (or electrons) upon high-Z neutral atoms could fill this gap. Similar studies with positrons of 660–795 keV would test the expectation that recoilless resonance creation of the Q0 source of these pairs is also possible.

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DEMARCO, G., C. FOSCO e R. C. TRINCHERO. "CONSISTENT CHIRAL QUANTUM ELECTRODYNAMICS". Modern Physics Letters A 06, n. 14 (10 maggio 1991): 1299–304. http://dx.doi.org/10.1142/s0217732391001391.

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Wilson, James H. "The quantum electrodynamics physical (QED-P) theory to complement quantum electrodynamics (QED)". Physics Essays 34, n. 1 (21 marzo 2021): 17–27. http://dx.doi.org/10.4006/0836-1398-34.1.17.

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The electronic and muonic hydrogen energy levels are calculated very accurately [M. L. Eides, H. Grotch, and V. Shelyuto, Phys. Rep. 342, 63 (2001)] in Quantum Electrodynamics (QED) by coupling the Dirac Equation four vector c(α, I) current covariantly with the external electromagnetic (EM) field four vector in QED’s Interactive Representation. While QED has been extraordinarily successful computationally, it presents no physical description of the electron, or other charged leptons. The QED-Physical (QED-P) theory presented in this paper is equivalent to QED in that it is based only on the four-current c(α, I) that is the reason that QED is so accurate computationally. However, QED-P describes the electron geometrically through the internal time/coordinate operators derived directly from c(α, I) with no assumptions. QED-P’s internal coordinate operators define an electron Center of Charge (CoC) point vibrating rapidly in space and time in its unique vacuum, creating the current that produces the electron’s magnetic moment and spin, and eliminating the need for “intrinsic” properties. QED-P also cuts off the photon propagator in a natural way so that the electron self-energy is finite and ad hoc renormalization procedures are not necessary. The c α-Non Exclusion Principle states that, if QED accepts c(α, I) as the electron current operator because of the very accurate hydrogen energy levels calculated, then one must also accept the QED-P electron internal spatial and time coordinate operators (ISaTCO) derived directly from c(α, I) without any other assumptions. QED-P shows the electron to be in both spin states simultaneously, and it is the external EM field that forces the electron’s spin state to be measured up or down. QED-P describes the bizarre, and very different, situation illustrated in Fig. 1 when the electron and muon are located “inside” the spatially extended proton with their CoCs orbiting the proton at the speed of light in S energy states of hydrogen, shedding some insight into the proton radius puzzle. The electron only appears to be a point particle with intrinsic properties when observed/measured from the far field. The Dirac‐Maxwell‐Wilson Equations are derived directly from the electron ISaTCO, and its EM fields “look” like they are from a point particle in far field scattering experiments in the same way the electric field from a sphere with evenly distributed charge “e” looks like a point charge with the same charge in the far field (Gauss Law). A physical basis for Quantum Entanglement is derived that can be measured experimentally.

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Derlet, P. M., H. S. Perlman e G. J. Troup. "Stimulated Vacuum Pair Production in a Focused Laser Field". Australian Journal of Physics 50, n. 4 (1997): 803. http://dx.doi.org/10.1071/p96104.

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The quantum electrodynamical process of vacuum pair production in the presence of a focused laser field is investigated. A coherent states picture of the electromagnetic field in the focal region is developed which facilitates its inclusion into perturbative S-matrix quantum electrodynamics. The lowest order differential transition rate with respect to the direction of the newly created positron is presented for a number of scattering geometries. It is found that with current technological trends such an event should be detectable in the not too distant future.

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Montenegro, David, e B. M. Pimentel. "Planar generalized electrodynamics for one-loop amplitude in the Heisenberg picture". International Journal of Modern Physics A 36, n. 19 (5 luglio 2021): 2150142. http://dx.doi.org/10.1142/s0217751x21501426.

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We examine the generalized quantum electrodynamics as a natural extension of the Maxwell electrodynamics to cure the one-loop divergence. We establish a precise scenario to discuss the underlying features between photon and fermion where the perturbative Maxwell electrodynamics fails. Our quantum model combines stability, unitarity, and gauge invariance as the central properties. To interpret the quantum fluctuations without suffering from the physical conflicts proved by Haag’s theorem, we construct the covariant quantization in the Heisenberg picture instead of the Interaction one. Furthermore, we discuss the absence of anomalous magnetic moment and mass-shell singularity.

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Del Cima, O. M., D. H. T. Franco, L. S. Lima e E. S. Miranda. "Quantum Parity Conservation in Planar Quantum Electrodynamics". International Journal of Theoretical Physics 60, n. 8 (15 luglio 2021): 3063–75. http://dx.doi.org/10.1007/s10773-021-04851-8.

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Clerk, A. A., K. W. Lehnert, P. Bertet, J. R. Petta e Y. Nakamura. "Hybrid quantum systems with circuit quantum electrodynamics". Nature Physics 16, n. 3 (marzo 2020): 257–67. http://dx.doi.org/10.1038/s41567-020-0797-9.

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Yoshihisa Yamamoto, Susumu Machida e Gunnar Björk. "Cavity quantum electrodynamics in quantum well lasers". Surface Science 267, n. 1-3 (gennaio 1992): 605–11. http://dx.doi.org/10.1016/0039-6028(92)91209-t.

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Efimov, G. V. "Stability of Quantum Electrodynamics and Quantum Chromodynamics". Theoretical and Mathematical Physics 141, n. 1 (ottobre 2004): 1398–414. http://dx.doi.org/10.1023/b:tamp.0000043856.41940.3c.

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Kiefer, Claus. "Decoherence in quantum electrodynamics and quantum gravity". Physical Review D 46, n. 4 (15 agosto 1992): 1658–70. http://dx.doi.org/10.1103/physrevd.46.1658.

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Manzalini, Antonio, e Bruno Galeazzi. "Explaining Homeopathy with Quantum Electrodynamics". Homeopathy 108, n. 03 (22 marzo 2019): 169–76. http://dx.doi.org/10.1055/s-0039-1681037.

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Background Every living organism is an open system operating far from thermodynamic equilibrium and exchanging energy, matter and information with an external environment. These exchanges are performed through non-linear interactions of billions of different biological components, at different levels, from the quantum to the macro-dimensional. The concept of quantum coherence is an inherent property of living cells, used for long-range interactions such as synchronization of cell division processes. There is support from recent advances in quantum biology, which demonstrate that coherence, as a state of order of matter coupled with electromagnetic (EM) fields, is one of the key quantum phenomena supporting life dynamics. Coherent phenomena are well explained by quantum field theory (QFT), a well-established theoretical framework in quantum physics. Water is essential for life, being the medium used by living organisms to carry out various biochemical reactions and playing a fundamental role in coherent phenomena. Methods Quantum electrodynamics (QED), which is the relativistic QFT of electrodynamics, deals with the interactions between EM fields and matter. QED provides theoretical models and experimental frameworks for the emergence and dynamics of coherent structures, even in living organisms. This article provides a model of multi-level coherence for living organisms in which fractal phase oscillations of water are able to link and regulate a biochemical reaction. A mathematical approach, based on the eigenfunctions of Laplace operator in hyper-structures, is explored as a valuable framework to simulate and explain the oneness dynamics of multi-level coherence in life. The preparation process of a homeopathic medicine is analyzed according to QED principles, thus providing a scientific explanation for the theoretical model of “information transfer” from the substance to the water solution. A subsequent step explores the action of a homeopathic medicine in a living organism according to QED principles and the phase-space attractor's dynamics. Results According to the developed model, all levels of a living organism—organelles, cells, tissues, organs, organ systems, whole organism—are characterized by their own specific wave functions, whose phases are perfectly orchestrated in a multi-level coherence oneness. When this multi-level coherence is broken, a disease emerges. An example shows how a homeopathic medicine can bring back a patient from a disease state to a healthy one. In particular, by adopting QED, it is argued that in the preparation of homeopathic medicines, the progressive dilution/succussion processes create the conditions for the emergence of coherence domains (CDs) in the aqueous solution. Those domains code the original substance information (in terms of phase oscillations) and therefore they can transfer said information (by phase resonance) to the multi-level coherent structures of the living organism. Conclusions We encourage that QED principles and explanations become embodied in the fundamental teachings of the homeopathic method, thus providing the homeopath with a firm grounding in the practice of rational medicine. Systematic efforts in this direction should include multiple disciplines, such as quantum physics, quantum biology, conventional and homeopathic medicine and psychology.

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Ashmead, John. "Time dispersion in quantum electrodynamics". Journal of Physics: Conference Series 2482, n. 1 (1 maggio 2023): 012023. http://dx.doi.org/10.1088/1742-6596/2482/1/012023.

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Abstract If we use the path integral approach, we can write quantum electrodynamics (QED) in a way that is manifestly relativistic. However the path integrals are confined to paths that are on mass-shell. What happens if we extend QED by computing the path integrals over all paths in energy momentum space, not only those on mass-shell? We use the requirement of covariance to do this in an unambiguous way. This gives a QED where the time/energy components appear in a way that is manifestly parallel to the space/momentum components: we have dispersion in time, entanglement in time, full equivalence of the Heisenberg uncertainty principle (HUP) in time to the HUP in space, and so on. Entanglement in time has the welcome side effect of eliminating the ultraviolet divergences. We recover standard QED in the long time limit. We predict effects at scales of attoseconds. With recent developments in attosecond physics and in quantum computing, these effects should be detectable. Since the predictions are unambiguous and testable the approach is falsifiable. Falsification would sharpen our understanding of the role of time in QED. Confirmation would have significant implications for attosecond physics, quantum computing and communications, and quantum gravity.

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Zhao, Changhao, Yongcheng He, Xiao Geng, Kaiyong He, Genting Dai, Jianshe Liu e Wei Chen. "Multi-Mode Bus Coupling Architecture of Superconducting Quantum Processor". Chinese Physics Letters 40, n. 1 (1 gennaio 2023): 010301. http://dx.doi.org/10.1088/0256-307x/40/1/010301.

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Resonators in circuit quantum electrodynamics systems naturally carry multiple modes, which may have non-negligible influence on qubit parameters and device performance. While new theories and techniques are under investigation to deal with the multi-mode effects in circuit quantum electrodynamics systems, researchers have proposed novel engineering designs featuring multi-mode resonators to achieve enhanced functionalities of superconducting quantum processors. Here, we propose multi-mode bus coupling architecture, in which superconducting qubits are coupled to multiple bus resonators to gain larger coupling strength. Applications of multi-mode bus couplers can be helpful for improving iSWAP gate fidelity and gate speed beyond the limit of single-mode scenario. The proposed multi-mode bus coupling architecture is compatible with a scalable variation of the traditional bus coupling architecture. It opens up new possibilities for realization of scalable superconducting quantum computation with circuit quantum electrodynamics systems.

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Mortensen, N. Asger. "Mesoscopic electrodynamics at metal surfaces". Nanophotonics 10, n. 10 (25 giugno 2021): 2563–616. http://dx.doi.org/10.1515/nanoph-2021-0156.

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Abstract Plasmonic phenomena in metals are commonly explored within the framework of classical electrodynamics and semiclassical models for the interactions of light with free-electron matter. The more detailed understanding of mesoscopic electrodynamics at metal surfaces is, however, becoming increasingly important for both fundamental developments in quantum plasmonics and potential applications in emerging light-based quantum technologies. The review offers a colloquial introduction to recent mesoscopic formalism, ranging from quantum-corrected hydrodynamics to microscopic surface-response formalism, offering also perspectives on possible future avenues.

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MIN, Hyunsoo, e Dongsu BAK. "Quantum Electrodynamics and Feynman Diagrams". Physics and High Technology 24, n. 5 (31 maggio 2015): 9. http://dx.doi.org/10.3938/phit.24.023.

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46

WON, Eunil. "Precision Tests of Quantum Electrodynamics". Physics and High Technology 24, n. 5 (31 maggio 2015): 22. http://dx.doi.org/10.3938/phit.24.026.

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47

Nikishov, Anatolii I. "Quantum electrodynamics of strong fields". Uspekhi Fizicheskih Nauk 152, n. 6 (1987): 355. http://dx.doi.org/10.3367/ufnr.0152.198706p.0355.

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48

Grismayer, T., R. Torres, P. Carneiro, F. Cruz, R. A. Fonseca e L. O. Silva. "Quantum Electrodynamics vacuum polarization solver". New Journal of Physics 23, n. 9 (1 settembre 2021): 095005. http://dx.doi.org/10.1088/1367-2630/ac2004.

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49

Dietz, K. "Relativistic Quantum Electrodynamics of Atoms". Physica Scripta T17 (1 gennaio 1987): 22–27. http://dx.doi.org/10.1088/0031-8949/1987/t17/003.

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50

Åberg, T. "Quantum electrodynamics of multiphoton ionization". Physica Scripta T46 (1 gennaio 1993): 173–81. http://dx.doi.org/10.1088/0031-8949/1993/t46/026.

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