Results 11 to 20 of about 3,811 (125)
Decoherence and Thermalization [PDF]
Physical Review Letters, 2007 We present a rigorous analysis of the phenomenon of decoherence for general N-level systems coupled to reservoirs of free massless bosonic fields. We apply our general results to the specific case of the qubit. Our approach does not involve master equation approximations and applies to a wide variety of systems which are not explicitly solvable.
Marco Merkli +2 more
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Optics and Spectroscopy, 2003 Gell-Mann's quarks are coherent particles confined within a hadron at rest, but Feynman's partons are incoherent particles which constitute a hadron moving with a velocity close to that of light. It is widely believed that the quark model and the parton model are two different manifestations of the same covariant entity.
Young S. Kim, Marilyn E. Noz
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SPIE Proceedings, 2003 Methods for quantifying environmentally induced decoherence in quantum systems are investigated. We formulate criteria for measuring the degree of decoherence and consider several representative examples, including a spin interacting with the modes of a bosonic, e.g., phonon, bath.
Arkady Fedorov +2 more
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Wormholes and holographic decoherence [PDF]
Journal of High Energy Physics, 2021 Abstract We study a class of decoherence process which admits a 3 dimensional holographic bulk. Starting from a thermo-field double dual to a wormhole, we prepare another thermo-field double which plays the role of environment. By allowing the energy flow between the original and environment thermo-field double, the entanglement of
Tomonori Ugajin +4 more
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Decoherence time in self-induced decoherence [PDF]
Physical Review A, 2005 11 ...
Mario Castagnino, Olimpia Lombardi
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Dynamics of decoherence: Universal scaling of the decoherence factor [PDF]
Physical Review A, 2016 We study the time dependence of the decoherence factor (DF) of a qubit globally coupled to an environmental spin system (ESS) which is driven across the quantum critical point (QCP) by varying a parameter of its Hamiltonian in time $t$ as $1 -t/ $ or $-t/ $, to which the qubit is coupled starting at the time $t \to -\infty$; here, $ $ denotes the ...
Tanay Nag, Amit Dutta, Sei Suzuki
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DECOHERENCE AND GRAVITATIONAL BACKGROUDS [PDF]
International Journal of Modern Physics A, 2002 We study the decoherence process associated with the scattering of stochastic gravitational waves. We discuss the case of macroscopic systems, such as the planetary motion of the Moon around the Earth, for which gravitational scattering is found to dominate decoherence though it has a negligible influence on damping.
Reynaud, Serge +4 more
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Decoherence and the Loschmidt Echo [PDF]
Physical Review Letters, 2003 Environment--induced decoherence causes entropy increase. It can be quantified using, e.g., the purity $ ={\rm Tr} ^2$. When the Hamiltonian of a quantum system is perturbed, its sensitivity to such perturbation can be measured by the Loschmidt echo $\bar M(t)$.
Cucchietti, Fernando .M. +3 more
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Dynamical Chaos and Decoherence [PDF]
Progress of Theoretical Physics Supplement, 2007 Fidelity is a convenient tool to study the sensitivity of quantum motion under Hamiltonian perturbations. In this paper we first show that classical chaos can produce the dephasing necessary to suppress quantum interference, even in the absence of any environment.
Davide Rossini +2 more
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Environmental decoherence versus intrinsic decoherence [PDF]
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2012 We review the difference between standard environmental decoherence and ‘intrinsic decoherence’, which is taken to be an ineluctable process of Nature. Environmental decoherence is typically modelled by spin bath or oscillator modes—we review some of the unanswered questions not captured by these models, and also the application of them to experiments.
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