Results 1 to 10 of about 6,289 (120)

Unitarity of Decoherence Implies Possibility of Decoherence-like Dynamics towards Macroscopic Superpositions

open access: yesEntropy, 2022
Quantum decoherence is crucial to understanding the emergence of the classical world from the underlying quantum reality. Decoherence dynamics are unitary, although they superselect a preferred eigenbasis.
Stanislav Filatov, Marcis Auzinsh
doaj   +1 more source

Decoherence, Anti-Decoherence, and Fisher Information

open access: yesEntropy, 2021
In this work, we study quantum decoherence as reflected by the dynamics of a system that accounts for the interaction between matter and a given field. The process is described by an important information geometry tool: Fisher’s information measure (FIM).
Andres M. Kowalski, Angelo Plastino
doaj   +1 more source

On the effect of decoherence on quantum tunnelling

open access: yesSN Applied Sciences, 2021
This work proposes a series of quantum experiments that can, at least in principle, allow for examining microscopic mechanisms associated with decoherence.
A. Y. Klimenko
doaj   +1 more source

Decoherence-Induced Sudden Death of Entanglement and Bell Nonlocality

open access: yesPhotonics, 2022
Decoherence due to the unwanted interaction between a quantum system and environment leads to the degradation of quantum coherence. In particular, for an entangled state, decoherence makes a loss of entanglement and Bell nonlocality known as entanglement
Dong-Gil Im, Yoon-Ho Kim
doaj   +1 more source

Procedure via cross-Kerr nonlinearities for encoding single logical qubit information onto four-photon decoherence-free states

open access: yesScientific Reports, 2021
We propose a photonic procedure using cross-Kerr nonlinearities (XKNLs) to encode single logical qubit information onto four-photon decoherence-free states.
Jino Heo, Seong-Gon Choi
doaj   +1 more source

Quantum control in open and periodically driven systems

open access: yesAdvances in Physics: X, 2021
Quantum technology resorts to efficient utilization of quantum resources to realize technique innovation. The systems are controlled such that their states follow the desired manners to realize different quantum protocols. However, the decoherence caused
Si-Yuan Bai   +3 more
doaj   +1 more source

Decoherence and Landauer’s principle in qubit-cavity quantum-field-theory interaction

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
We consider quantum decoherence and Landauer’s principle in qubit-cavity quantum field theory (QFT) interaction, treating the qubit as the system and cavity QFT as the environment. In particular, we investigate the changes that occur in the system with a
Hao Xu, Si Yu Chen, Yen Chin Ong
doaj   +1 more source

Stabilizer codes for open quantum systems

open access: yesScientific Reports, 2023
The Lindblad master equation describes the evolution of a large variety of open quantum systems. An important property of some open quantum systems is the existence of decoherence-free subspaces.
Francisco Revson F. Pereira   +2 more
doaj   +1 more source

Decoherence in Conformal Field Theory

open access: yesJournal of High Energy Physics, 2020
Noise sources are ubiquitous in Nature and give rise to a description of quantum systems in terms of stochastic Hamiltonians. Decoherence dominates the noise-averaged dynamics and leads to dephasing and the decay of coherences in the eigenbasis of the ...
Adolfo del Campo, Tadashi Takayanagi
doaj   +1 more source

Nonadiabatic quantum state engineering by time-dependent decoherence-free subspaces in open quantum systems

open access: yesNew Journal of Physics, 2021
We extend the theory of quantum state engineering (QSE) to the open quantum systems which simultaneously suffer time-dependent decoherence and time-independent decoherence.
Qi-Cheng Wu   +4 more
doaj   +1 more source

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