Weak value amplification in an optomechanical system with mach-zehnder interferometer

Jialin Li, Yazhi Niu, Lupei Qin +1 more

We propose a postselected amplification scheme for phase-shift measurement of optical coherent states when passing through the Mach-Zehnder interferometer (MZI). Different from the usual weak-value-amplification (WVA) formulation, the which-path states of the MZI cannot be described as subsystem states entangled with two optical coherent states. However, we obtain the same phase amplification result of the usual WVA in the Aharonov-Albert-Vaidman limit but, beyond this limit, the result is essentially different. We explicitly carry out the amplified phase shift, which can be extracted out from the field-quadrature measurement in the dark port of the MZI. We also evaluate the performance quality of the proposed scheme and analyze the technical advantages by considering possible errors in the quadrature measurement.

Manoj Das

Akhtar Munir, Kashif Ammar Yasir, Wu-Ming Liu +1 more

Meiting Song, John Steinmetz, Yi Zhang +4 more

We show, for the first time, phase measurement with weak value amplification on an integrated photonic chip. We demonstrate 9 dB of signal enhancement over a standard on-chip Mach-Zehnder interferometer with equal detected optical power.

Max Ludwig

Yuhan Mei, Meiting Song, Andrew N. Jordan +1 more

We demonstrate a 30dB signal enhancement in the phase response of an on-chip weak value interferometer compared to a standard Mach-Zehnder interferometer paving the way to ultrahigh sensitivity in classical interferometry.