Research on displacement-assisted quantum linear amplifiers

Kun Wang; Jian Sheng Guo; Sheng Li Zhang

doi:10.3969/j.issn.0372-2112.2016.07.010

Research on displacement-assisted quantum linear amplifiers

Kun Wang, Jian Sheng Guo^*, Sheng Li Zhang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Quantum linear amplifier is an important tool to enhance already-known quantum communications. It can be used to protect the quantum state against photon loss. However, the gain and the probability of success in amplification is quite low. To this point, we propose to use coherent displacement operations to enhance quantum linear amplifiers. We derive the exact threshold beyond which local displacement helps to enhance distillation. We apply our state transfer theorem and numerically evaluate the dependence of quantum linear amplifiers gain on the amounts of displacement.

Original language	English
Pages (from-to)	1587-1591
Number of pages	5
Journal	Tien Tzu Hsueh Pao/Acta Electronica Sinica
Volume	44
Issue number	7
DOIs	https://doi.org/10.3969/j.issn.0372-2112.2016.07.010
Publication status	Published - 1 Jul 2016
Externally published	Yes

Keywords

Quantum displacement operations
Quantum linear amplifier
Quantum optics

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10.3969/j.issn.0372-2112.2016.07.010

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abstract = "Quantum linear amplifier is an important tool to enhance already-known quantum communications. It can be used to protect the quantum state against photon loss. However, the gain and the probability of success in amplification is quite low. To this point, we propose to use coherent displacement operations to enhance quantum linear amplifiers. We derive the exact threshold beyond which local displacement helps to enhance distillation. We apply our state transfer theorem and numerically evaluate the dependence of quantum linear amplifiers gain on the amounts of displacement.",

keywords = "Quantum displacement operations, Quantum linear amplifier, Quantum optics",

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year = "2016",

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AB - Quantum linear amplifier is an important tool to enhance already-known quantum communications. It can be used to protect the quantum state against photon loss. However, the gain and the probability of success in amplification is quite low. To this point, we propose to use coherent displacement operations to enhance quantum linear amplifiers. We derive the exact threshold beyond which local displacement helps to enhance distillation. We apply our state transfer theorem and numerically evaluate the dependence of quantum linear amplifiers gain on the amounts of displacement.

KW - Quantum displacement operations

KW - Quantum linear amplifier

KW - Quantum optics

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Research on displacement-assisted quantum linear amplifiers

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Keywords

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