Phase sensing with a truncated SU(1,1) interferometer
P. Gupta, Brian E. Anderson, Bonnie L. Schmittberger, Travis Horrom, Carla Hermann-Avigliano, Kevin M. Jones, Paul D. Lett · 2017
We present an SU(1,1) interferometer variation by replacing the second nonlinear interaction with the homodyne detection and demonstrate an improvement in phase sensitivity over the standard quantum limit.