3 papers
quant-ph2026
Criticality-enhanced global frequency sensing with a monitored Kerr parametric oscillator via extended Kalman filter
Cheng Zhang, Mauro Cirio, Xin-Qi Li +1
We analyze a global sensing scenario in which the frequency of a monitored Kerr parametric oscillator is estimated assuming limited prior information. The frequency is estimated in…
quant-ph2025
Purified pseudomode model for nonlinear system-bath interactions
Cheng Zhang, Neill Lambert, Xin-Qi Li +2
The theory of purified pseudomodes [arXiv:2412.04264 (2024)] was recently developed to provide a numerical tool for the analysis of the properties of a quantum system and the envir…
quant-ph2025
Enhancing information retrieval in quantum-optical critical systems via quantum measurement backaction
Cheng Zhang, Mauro Cirio, Xin-Qi Li +1
Continuous monitoring of open quantum-optical systems offers a promising route towards quantum-enhanced estimation precision. In such continuous-measurement-based sensing protocols…