12 papers
Fully-connected three-mode squeezed vacuum: Gaussian entanglement, steering, and collective photon subtraction
Manjia Mai, Jifeng Sun, Teng Zhao +2
We investigate a fully-connected three-mode squeezed vacuum (FC-C3MSV) state, where all three modes are pairwise coupled through nonlinear interactions in a triangle () topolo…
Enhanced Phase Estimation via Photon-Added Two-Mode Squeezed States and Kerr Nonlinearity
Zekun Zhao, Qingqian Kang, Teng Zhao +3
Quantum metrology employs quantum resources to achieve measurement precision beyond classical limits. This work investigates a Mach--Zehnder interferometer incorporating a Kerr non…
Quantum Steering and Entanglement in a Tritter: Hierarchy under Loss
Jifeng Sun, Shumin Yang, Teng Zhao +2
We present a comprehensive phase diagram of quantum correlations in a three-mode Gaussian state generated by a tritter, driven by a two-mode squeezed vacuum and a coherent state. T…
Phase estimation via photon subtraction at the output of the hybrid interferometer
Qisi Zhou, Tao Jiang, Qingqian Kang +4
The hybrid interferometer integrating an optical parametric amplifier and a beam splitter has the potential to outperform the SU(1,1) interferometer. However, photon loss remains a…
Phase sensitivity of lossy Mach-Zehnder interferometer via photon addition operation
Qisi Zhou, Qingqian Kang, Teng Zhao +3
Photon addition operations applied to squeezed states have been shown to significantly enhance phase sensitivity. In this study, we extend this approach by applying photon addition…
Phase estimation via delocalized photon subtraction operation inside the SU(1,1) interferometer
Zhihao Li, Qingqian Kang, Teng Zhao +3
We propose a theoretical scheme to improve the precision of phase measurement using intensity detection by implementing delocalized photon subtraction operation (D-PSO) inside the…