6 papers
Unified theory of classical and quantum semiparametric efficiency
Mankei Tsang
In classical and quantum statistics, high-dimensional unknown parameters are abundant and it is often prudent to make minimal assumptions about them using so-called semiparametric…
Passive optical superresolution at the quantum limit
A. I. Lvovsky, Michael R. Grace, Saikat Guha +3
For more than a century, the diffraction limit has defined the resolution achievable by passive optical imaging systems. Although some resolution improvement can be gained through…
Spectrum analysis with quantum dynamical systems. II. Finite-time analysis
Xinyi Sui, Mankei Tsang
The prequel to this work [Ng et al., Phys. Rev. A 93, 042121 (2016)] proposes the method of spectral photon counting to enhance noise spectroscopy with an optical interferometer. W…
Approaching the Ultimate Limit of Quantum Multiparameter Estimation by Many-Body Physics
Mankei Tsang
I propose a physical measurement scheme on multiple independent and identically distributed quantum objects to approach the Holevo--Nagaoka bound for quantum multiparameter estimat…
Quantum Onsager relations
Mankei Tsang
Using quantum information geometry, I derive quantum generalizations of the Onsager rate equations, which model the dynamics of an open system near a steady state. The generalized…
Quantum reversal: a general theory of coherent quantum absorbers
Mankei Tsang
The fascinating concept of coherent quantum absorber - which can absorb any photon emitted by another system while maintaining entanglement with that system - has found diverse imp…