Complementarity via Minimum Error Measurement in a Two-Path Interferometer

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2019,（5）
• 页码范围: 8-12
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/0256-307X/36/5/050302

摘要

We study the fringe visibility and the which-path information (WPI) of a general Mach Zehnder interferometer with an asymmetric beam splitter (BS).A minimum error measurement in the detector is used to extract the WPI.Both the fringe visibility V and the WPI Ipath are affected by the initial state of the photon and the second asymmetric BS.The condition in which the WPI takes the maximum is obtained.The complementarity relationship V2 +I2path ≤ 1 is found,and the conditions for equality are also presented.