ABSTRACT A new type of quantum interferometer was recently realized that employs
parametric amplifiers (PAs) as the wave splitting and mixing elements. The quantum …

The four-wave mixing process in atomic ensembles has many important applications in
quantum information. We review recent progress on the generation of optical quantum states …

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 …

Interferometers are widely used as sensors in precision measurement. Compared with a
conventional Mach–Zehnder interferometer, the sensitivity of a correlation-enhanced …

High precision interferometers are the building blocks of precision metrology and the
ultimate interferometric sensitivity is limited by the quantum noise. Here, we propose and …

Nonlinear interferometers that replace beam splitters in Mach-Zehnder interferometers with
nonlinear amplifiers for quantum-enhanced phase measurements have drawn increasing …

In this paper, the authors review the use of parity as a detection observable in quantum
metrology and introduce some original findings with regard to measurement resolution in …

Nonlinear interferometers are promising tools for quantum metrology, as they are
characterized by an improved phase sensitivity scaling compared to linear interferometers …

We study the phase sensitivity of an SU (1, 1) interferometer with photon loss by using three
different photon operations schemes, ie, performing photon-addition operation on the input …

We investigate the sub-Planck-scale structures associated with the SU (1, 1) group by
establishing that the Planck scale on the hyperbolic plane can be considered as the inverse …