Environment-Induced Decoherence and the Transition from Quantum to Classical

Paz, Juan Pablo; Zurek, Wojciech H.

doi:10.1007/3-540-45338-5_8

Cited by 125 publications

(178 citation statements)

References 75 publications

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Section: Discussionmentioning

confidence: 99%

Quantum origin of quantum jumps: Breaking of unitary symmetry induced by information transfer in the transition from quantum to classical

Zurek

2007

Phys. Rev. A

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Measurements transfer information about a system to the apparatus, and then further on -to observers and (often inadvertently) to the environment. I show that even imperfect copying essential in such situations restricts possible unperturbed outcomes to an orthogonal subset of all possible states of the system, thus breaking the unitary symmetry of its Hilbert space implied by the quantum superposition principle. Preferred outcome states emerge as a result. They provide framework for the "wavepacket collapse", designating terminal points of quantum jumps, and defining the measured observable by specifying its eigenstates. In quantum Darwinism, they are the progenitors of multiple copies spread throughout the environment -the fittest quantum states that not only survive decoherence, but subvert it into carrying information about them -into becoming a witness.

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Section: Discussionmentioning

confidence: 99%

Quantum origin of quantum jumps: Breaking of unitary symmetry induced by information transfer in the transition from quantum to classical

Zurek

2007

Phys. Rev. A

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“…We do not see states which represent a cat in a superposition of dead and alive states [3]. This maybe due to the fact that quantum mechanics is modified at a certain scale [4,5] or it maybe due to the extremely rapid decoherence of such states as the result of their macroscopic number of constituents with the outside world [6]. There is now intensive experimental [1,2] and theoretical investigations [5] to reveal if there is a distinct border between the micro and macro world.…”

mentioning

confidence: 92%

Scaling of macroscopic superpositions close to a quantum phase transition

Abad¹,

Karimipour²

2016

Phys. Rev. B

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It is well known that in a quantum phase transition (QPT), entanglement remains short ranged [Osterloh et al., Nature 416 608-610 (2005)]. We ask if there is a quantum property entailing the whole system which diverges near this point. Using the recently proposed measures of quantum macroscopisity, we show that near a quantum critical point, it is the effective size of macroscopic superposition between the two symmetry breaking states which grows to the scale of system size and its derivative with respect to the coupling shows both singular behavior and scaling properties.

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“…The QBM model is one of the few models of open quantum systems amenable to an analytical solution [1,2,[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Environment-dependent dissipation in quantum Brownian motion

et al. 2009

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The dissipative dynamics of a quantum Brownian particle is studied for different types of environment. We derive analytic results for the time evolution of the mean energy of the system for Ohmic, sub-Ohmic and super-Ohmic environments, without performing the Markovian approximation. Our results allow to establish a direct link between the form of the environmental spectrum and the thermalization dynamics. This in turn leads to a natural explanation of the microscopic physical processes ruling the system time evolution both in the short-time non-Markovian region and in the long-time Markovian one. Our comparative study of thermalization for different environments sheds light on the physical contexts in which non-Markovian dissipation effects are dominant.

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Environment-Induced Decoherence and the Transition from Quantum to Classical

Cited by 125 publications

References 75 publications

Quantum origin of quantum jumps: Breaking of unitary symmetry induced by information transfer in the transition from quantum to classical

Quantum origin of quantum jumps: Breaking of unitary symmetry induced by information transfer in the transition from quantum to classical

Scaling of macroscopic superpositions close to a quantum phase transition

Environment-dependent dissipation in quantum Brownian motion

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