Detection of 13.8 dB squeezed vacuum states by optimizing the interference efficiency and gain of balanced homodyne detection Sun, Xiaocong ; Wang, Yajun ; Tian, Long ; Zheng, Yaohui ; Peng, Kunchi Abstract Publication: Chinese Optics Letters Pub Date: 2019 DOI: 10.3788/COL201917.072701 Bibcode: 2019ChOpL..17g2701S