Quantum-enhanced interferometry with asymmetric beam splitters

• 作者: Fan Wang Lan Zhou Peng Xu Wei Zhong YuBo Sheng
• 来源期刊: 中国科学:物理学 力学 天文学（英文版）
• 年，卷（期）: 2020,（6）
• 页码范围: 22-32
• 页数: 11页
• 语种: 英文

摘要

In this paper,we investigate the phase sensitivities in two-path optical interferometry with asymmetric beam splitters.Here,we present the optimal conditions for the transmission ratio and the phase of the beam splitter to gain the highest sensitivities for a general class of non-classical states with parity symmetry.Additionally,we address the controversial question of whether the scheme with a combination of coherent state and photon-added or photon-subtracted squeezed vacuum state is better or worse than the most celebrated one using a combination of coherent state and squeezed vacuum state.