Quantum-enhanced optical phase tracking: experiment and ultimate limits
Howard M. Wiseman · The Rochester Conferences on Coherence and Quantum Optics and the Quantum Information and Measurement meeting · 2013
We surpass the coherent-state limit to optical phase tracking using a CW phase-squeezed beam. Our phase varies stochastically over a wide range and consequently the best precision is achieved for a finite degree of squeezing.