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Title: Protecting quantum coherence of two-level atoms from vacuum fluctuations of electromagnetic field

Abstract

In the framework of open quantum systems, we study the dynamics of a static polarizable two-level atom interacting with a bath of fluctuating vacuum electromagnetic field and explore under which conditions the coherence of the open quantum system is unaffected by the environment. For both a single-qubit and two-qubit systems, we find that the quantum coherence cannot be protected from noise when the atom interacts with a non-boundary electromagnetic field. However, with the presence of a boundary, the dynamical conditions for the insusceptible of quantum coherence are fulfilled only when the atom is close to the boundary and is transversely polarizable. Otherwise, the quantum coherence can only be protected in some degree in other polarizable direction. -- Highlights: •We study the dynamics of a two-level atom interacting with a bath of fluctuating vacuum electromagnetic field. •For both a single and two-qubit systems, the quantum coherence cannot be protected from noise without a boundary. •The insusceptible of the quantum coherence can be fulfilled only when the atom is close to the boundary and is transversely polarizable. •Otherwise, the quantum coherence can only be protected in some degree in other polarizable direction.

Authors:
; ; ;
Publication Date:
OSTI Identifier:
22560304
Resource Type:
Journal Article
Journal Name:
Annals of Physics
Additional Journal Information:
Journal Volume: 366; Journal Issue: Complete; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-4916
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATOMS; ELECTROMAGNETIC FIELDS; ENERGY LEVELS; FLUCTUATIONS; NOISE; QUANTUM DECOHERENCE; QUANTUM SYSTEMS; QUBITS

Citation Formats

Liu, Xiaobao, Tian, Zehua, Wang, Jieci, and Jing, Jiliang. Protecting quantum coherence of two-level atoms from vacuum fluctuations of electromagnetic field. United States: N. p., 2016. Web. doi:10.1016/J.AOP.2015.12.010.
Liu, Xiaobao, Tian, Zehua, Wang, Jieci, & Jing, Jiliang. Protecting quantum coherence of two-level atoms from vacuum fluctuations of electromagnetic field. United States. https://doi.org/10.1016/J.AOP.2015.12.010
Liu, Xiaobao, Tian, Zehua, Wang, Jieci, and Jing, Jiliang. 2016. "Protecting quantum coherence of two-level atoms from vacuum fluctuations of electromagnetic field". United States. https://doi.org/10.1016/J.AOP.2015.12.010.
@article{osti_22560304,
title = {Protecting quantum coherence of two-level atoms from vacuum fluctuations of electromagnetic field},
author = {Liu, Xiaobao and Tian, Zehua and Wang, Jieci and Jing, Jiliang},
abstractNote = {In the framework of open quantum systems, we study the dynamics of a static polarizable two-level atom interacting with a bath of fluctuating vacuum electromagnetic field and explore under which conditions the coherence of the open quantum system is unaffected by the environment. For both a single-qubit and two-qubit systems, we find that the quantum coherence cannot be protected from noise when the atom interacts with a non-boundary electromagnetic field. However, with the presence of a boundary, the dynamical conditions for the insusceptible of quantum coherence are fulfilled only when the atom is close to the boundary and is transversely polarizable. Otherwise, the quantum coherence can only be protected in some degree in other polarizable direction. -- Highlights: •We study the dynamics of a two-level atom interacting with a bath of fluctuating vacuum electromagnetic field. •For both a single and two-qubit systems, the quantum coherence cannot be protected from noise without a boundary. •The insusceptible of the quantum coherence can be fulfilled only when the atom is close to the boundary and is transversely polarizable. •Otherwise, the quantum coherence can only be protected in some degree in other polarizable direction.},
doi = {10.1016/J.AOP.2015.12.010},
url = {https://www.osti.gov/biblio/22560304}, journal = {Annals of Physics},
issn = {0003-4916},
number = Complete,
volume = 366,
place = {United States},
year = {Tue Mar 15 00:00:00 EDT 2016},
month = {Tue Mar 15 00:00:00 EDT 2016}
}