Enhanced phase sensitive amplification towards improving noise immunity
Hui Guo(郭辉), Zhi Li(李治), Hengxin Sun(孙恒信), Kui Liu(刘奎)†, and Jiangrui Gao(郜江瑞)
State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
Abstract Quantum states are essential resource for quantum-enhanced applications. Loss incurred in the distribution channel, however, dissipates the high signal-to-noise ratio advantage enjoyed by the squeezed state. Here, we first demonstrate noise immunity enhancement by using phase-sensitive amplifier (PSA) with measurement-based noiseless linear amplifier (MB-NLA). We explore the signal transfer capability with the amplifier in a noisy channel. The MB-NLA enhanced PSA has obvious suppression effect on channel noises, especially it has improvement for the noise contaminated signal. Better performance can be achieved by flexibly adjusting amplifier parameters. With the amplifier, it is promising to overcome the entanglement-distribution loss and show its superiority in squeezing based quantum sensing.
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 12074233), the National Key Research and Development Program of China (Grant No. 2021YFC2201802), and Shanxi (1331 Project).
Corresponding Authors:
Kui Liu
E-mail: liukui@sxu.edu.cn
Cite this article:
Hui Guo(郭辉), Zhi Li(李治), Hengxin Sun(孙恒信), Kui Liu(刘奎), and Jiangrui Gao(郜江瑞) Enhanced phase sensitive amplification towards improving noise immunity 2023 Chin. Phys. B 32 054204
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