Adaptive Homodyne Measurement of Optical Phase
Adaptive Homodyne Measurement of Optical Phase
We present an experimental demonstration of the power of feedbackin quantum metrology, confirming the predicted [H. M. Wiseman, Phys. Rev. Lett. 75, 4587 (1995)] superior performanceof an adaptive homodyne technique for single-shotmeasurement of optical phase. For measurements performed on weak coherentstates with no prior knowledge of the signal phase, adaptive …