Although SU (1, 1) interferometry achieves Heisenberg-limited sensitivities, it suffers from
one major drawback: Only those particles outcoupled from the pump mode contribute to the …

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

The SU (1, 1) interferometer can be thought of as a Mach-Zehnder interferometer with its
linear beam splitters replaced with parametric nonlinear optical processes. We consider the …

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 …

This study investigates the use of orbital angular momentum (OAM) to enhance phase
estimation in Mach-Zehnder interferometers by employing non-Gaussian states as input …

A nonlinear phase shift is introduced to a Mach-Zehnder interferometer (MZI), and we
present a scheme for enhancing the phase sensitivity. In our scheme, one input port of a …

We theoretically derive the lower and upper bounds of quantum Fisher information (QFI) of
an SU (1, 1) interferometer whatever the input state chosen. According to the QFI, the crucial …

We theoretically study the effects of loss on the phase sensitivity of an SU (1, 1)
interferometer with parity detection with various input states. We show that although the …

An atom-light hybrid quantum gyroscope (ALHQG) is proposed due to its high rotation
sensitivity. It consists of an optical Sagnac loop to couple rotation rate and an atomic …

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 …