3 papers
quant-ph2026
Global Precision Limits in Critical Quantum Metrology: From Cramér-Rao to Ziv-Zakai
Neng Zeng, Tao Liu, Yu-Ran Zhang
Critical quantum metrology with equilibrium states predicts quantum-enhanced sensitivity only in the vicinity of criticality, where large prior information about the parameter is r…
quant-ph2025
Non-Hermitian sensing from the perspective of post-selected measurements
Neng Zeng, Tao Liu, Keyu Xia +2
By employing the Naimark dilation, we establish a fundamental connection between non-Hermitian quantum sensing and post-selected measurements. The sensitivity of non-Hermitian quan…
quant-ph2024
Chiral-Extended Photon-Emitter Dressed States in Non-Hermitian Topological Baths
Zhao-Fan Cai, Xin Wang, Zi-Xuan Liang +2
The interplay of quantum emitters and non-Hermitian structured baths has received increasing attention in recent years. Here, we predict unconventional quantum optical behaviors of…