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Title: Precision protection through indirect correlations

Abstract

The dynamics of the quantum Fisher information of the parameters of the initial atomic state is studied, in the framework of open quantum systems, for a pair of static two-level atoms coupled to a bath of fluctuating vacuum scalar fields. Our results show that the correlations between the two atoms as well as the precision limit in quantum metrology are determined by the separation between the two atoms. Remarkably, when the separation between the two atoms approaches zero, the quantum Fisher information, thus the precision limit of the estimation of the parameters of the initial atomic state will be survived from the vacuum fluctuations after long time evolution.

Authors:
Publication Date:
OSTI Identifier:
22560311
Resource Type:
Journal Article
Resource Relation:
Journal Name: Annals of Physics; Journal Volume: 367; 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)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; ATOMS; CORRELATIONS; ENERGY LEVELS; FLUCTUATIONS; QUANTUM INFORMATION; QUANTUM SYSTEMS; SCALAR FIELDS

Citation Formats

Jin, Yao, E-mail: 616969274@qq.com. Precision protection through indirect correlations. United States: N. p., 2016. Web. doi:10.1016/J.AOP.2016.01.017.
Jin, Yao, E-mail: 616969274@qq.com. Precision protection through indirect correlations. United States. doi:10.1016/J.AOP.2016.01.017.
Jin, Yao, E-mail: 616969274@qq.com. Fri . "Precision protection through indirect correlations". United States. doi:10.1016/J.AOP.2016.01.017.
@article{osti_22560311,
title = {Precision protection through indirect correlations},
author = {Jin, Yao, E-mail: 616969274@qq.com},
abstractNote = {The dynamics of the quantum Fisher information of the parameters of the initial atomic state is studied, in the framework of open quantum systems, for a pair of static two-level atoms coupled to a bath of fluctuating vacuum scalar fields. Our results show that the correlations between the two atoms as well as the precision limit in quantum metrology are determined by the separation between the two atoms. Remarkably, when the separation between the two atoms approaches zero, the quantum Fisher information, thus the precision limit of the estimation of the parameters of the initial atomic state will be survived from the vacuum fluctuations after long time evolution.},
doi = {10.1016/J.AOP.2016.01.017},
journal = {Annals of Physics},
number = Complete,
volume = 367,
place = {United States},
year = {Fri Apr 15 00:00:00 EDT 2016},
month = {Fri Apr 15 00:00:00 EDT 2016}
}