Xiaoping Ma, Chenglong You, Sushovit Adhikari, Elisha S. Matekole, Ryan T. Glasser, Hwang Lee, and Jonathan P. Dowling, "Sub-shot-noise-limited phase estimation via SU(1,1) interferometer with thermal states," Opt. Express 26, 18492-18504 (2018)
Xiaoping Ma, Chenglong You, Sushovit Adhikari, Elisha S. Matekole, Ryan T. Glasser, Hwang Lee, and Jonathan P. Dowling, "Sub-shot-noise-limited phase estimation via SU(1,1) interferometer with thermal states," Opt. Express 26, 18492-18504 (2018)