We theoretically study the phase sensitivity of an SU (1, 1) interferometer, in which the phase
shift is induced by a Kerr medium, together with a coherent state input and homodyne …

In this paper, we revisit the quantum Fisher information (QFI) calculation in SU (1, 1)
interferometer considering different phase configurations. When one of the input modes is a …

SU (1, 1) interferometers, based on the usage of nonlinear elements, are superior to passive
interferometers in phase sensitivity. However, the SU (1, 1) interferometer cannot make full …

A novel scheme for the enhancement of phase sensitivity based on a Mach–Zehnder
interferometer (MZI) and intensity detection is proposed. With the input of bright entangled …

We address SU (1, 1) interferometry in the presence of phase diffusion and photon losses
and evaluate analytically the corresponding quantum Fisher information. Using this result …

In quantum metrology, parity detection is often used to investigate the phase estimation
based on optical interferometer. Different from previous work, we consider a Mach–Zehnder …

In a previous paper Zhan et al.(2022) proposed the coherent state representation for linear
operator, which shows a beautiful theoretical value. Inspired by the work, we further extend it …

Classical and quantum states working in concert play an essential role in high-precision
interferometry. In this regard, coherent combined with squeezed vacuum states are the most …

Nonlinear interferometers, also known as SU (1, 1) interferometers, are unconventional
interferometers deploying nonlinear elements. Previous studies showed that they can …

We theoretically investigate the parity-based phase estimation and the quantum Fisher
information in an SU (1, 1) interferometer with different phase configuration. For the parity …