Shengshi Pang

Variational Principle for Optimal Quantum Controls in Quantum Metrology

2022 · Physical Review Letters

We develop a variational principle to determine the quantum controls and initial state that optimizes the quantum Fisher information, the quantity characterizing the precision in quantum metrology. When the set of available controls is limited, …

Optimal quantum superresolution for full distance between incoherent optical sources in two dimensions

2025 · arXiv (Cornell University)

The Rayleigh criterion has long served as a fundamental limit for the resolution of optical imaging. Recent advances in multiparameter quantum metrology have led to quantum superresolution that can break this limit and achieve nonvanishing …