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 int...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.展开更多
基金Supported by the Innovation Program of Shanghai Municipal Education Commission(Grant No.2021-01-07-00-08-E00100)the National Natural Science Foundation of China(Grant Nos.11874155,91436211,11374104)+6 种基金the Basic Research Project of Shanghai Science and Technology Commission(20JC1416100)the Natural Science Foundation of Shanghai(Grant No.17ZR1442900)Minhang Leading Talents(Grant No.201971),the Program of Scientific and Technological Innovation of Shanghai(Grant No.17JC1400401)the Shanghai Sailing Program(Grant No.21YF1410800)the National Basic Research Program of China(Grant No.2016YFA0302103)the Shanghai Municipal Science and Technology Major Project(Grant No.2019SHZDZX01)the 111 Project(Grant No.B12024).
文摘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.