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Quantum Information Processing

High-precision parameter estimation and the Zeno–anti-Zeno crossover in an atom–cavity-optomechanical system

  • 01-08-2020
Published in:
Authors
Mengmeng Luo
Wenxiao Liu
Yong He
Shaoyan Gao
Published in
Quantum Information Processing | Issue 8/2020

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Abstract

A scheme is proposed to estimate the decay rates of the subsystem in an atom–cavity-optomechanical system which also is known as the hybrid optomechanical system. Quantum Fisher information and quantum Zeno effect (QZE) are investigated under different conditions. The results show that the estimation precision of the decay rates can reach \(9.64\times 10^{-6}\), \(3.49\times 10^{-4}\) and \(7.91\times 10^{-5}\), respectively. The Zeno–anti-Zeno crossover can be realized in the hybrid optomechanical system. We find that both QZE and quantum anti-Zeno effect (QAZE) are always beneficial to the estimation of the mechanical oscillator decay rate. However, when the cavity decay rate is estimated, QAZE may enhance or inhibit the estimation precision at the different time regions. The results provide some potential applications in quantum networks and quantum Zeno switch.

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previous article A unitary operator construction solution based on Pauli group for maximal dense coding with a class of symmetric states
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Title
High-precision parameter estimation and the Zeno–anti-Zeno crossover in an atom–cavity-optomechanical system
Authors
Mengmeng Luo
Wenxiao Liu
Yong He
Shaoyan Gao
Publication date
01-08-2020
Publisher
Springer US
Published in
Quantum Information Processing / Issue 8/2020
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-020-02733-2
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