Low-Noise Intensity Amplification of a Bright Entangled Beam
Yanbo Lou1, Xiaoyin Xu1, Shengshuai Liu1*, and Jietai Jing1,2,3,4*
1State Key Laboratory of Precision Spectroscopy, Joint Institute of Advanced Science and Technology, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China 2CAS Center for Excellence in Ultra-intense Laser Science, Shanghai 201800, China 3Department of Physics, Zhejiang University, Hangzhou 310027, China 4Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
Abstract：We experimentally demonstrate a low-noise phase-sensitive amplifier (PSA) scheme that is able to amplify bright entangled beams at a high level intensity gain of up to 4.4. Moreover, we demonstrate that the PSA scheme introduces much less uncorrelated extra noise to the entangled state than the phase-insensitive amplifier scheme with the same intensity gain. This PSA scheme has potential applications for quantum communication in continuous variable regimes.
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2021, Vol. 38 
