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Noiseless linear amplification of polarization-encoded quantum states with efficient quantum scissors

Quantum Information Processing, ISSN: 1573-1332, Vol: 23, Issue: 6
2024
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Article Description

Polarization-encoded single-photon qubit and single-photon entanglement are important resources of quantum communication. In practical long-distance quantum communication, photon transmission loss caused by the channel noise is a big obstacle. Noiseless linear amplification (NLA) is a useful method to solve the photon transmission loss problem. In the paper, we propose two efficient NLA protocols for the polarization-encoded single-photon qubit and single-photon entanglement, respectively. Our NLA protocols can increase the fidelity of the target photon state and perfectly preserve the encoded polarization feature. Moreover, local-quadrature squeezing operation is introduced into the NLA protocols to further improve the amplification. Our NLA protocols have important application in future quantum communication field.

Bibliographic Details

Ya Peng Feng; Jing Qiu Gu; Ming Ming Du; Yu Bo Sheng; Lan Zhou; Xi Yun Li; Wei Zhong

Springer Science and Business Media LLC

Materials Science; Physics and Astronomy; Mathematics; Computer Science; Engineering

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