Observation of Non-Hermitian Quantum Correlation Criterion in Mesoscopic Optomechanical System
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发表时间:2019-03-13
论文类型:期刊论文
发表时间:2016-04-01
发表刊物:INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
收录刊物:SCIE
卷号:55
期号:4
页面范围:2097-2109
ISSN号:0020-7748
关键字:Quantum correlation criterion; Quantum chaos; Optomechanical system
摘要:Although many quantum correlation criteria have been proposed successively in recent years, it is still an open question how to observe these criteria with the non-Hermitian terms in themselves. We propose an indirect scheme in this paper to observe non-Hermitian criteria and to judge whether or not quantum correlation exists in the system even though the expectation value measurement of non-Hermitian operator is invalid in quantum mechanics system. Our idea is to establish a critical state of mesoscopic oscillator under mean-field approximation, and the oscillator state will take place transition when the quantum correlation destroys the mean-field approximation. The non-Hermitian measurement will replace the position measurement in this process and it can be seen as a non-destructive detection. We give an example to explain this idea in a designed mesoscopic optomechanical system.