【报告题目】Squeezing Metrology: a unified framework
【报告人】Lorenzo Maccone(教授), University of Pavia
会议ID：692 4167 4817, 密码：680995
【报告摘要】I will briefly introduce quantum metrology and then focus on quantum metrology for squeezing. Usually the theory uses the resolution gains obtainable thanks to the entanglement among N probes. Typically, a quadratic gain in resolution is achievable, going from the $1/\sqrt(N)$ of the central limit theorem to the $1/N$ of the Heisenberg bound. We focus on quantum squeezing and provide a unified framework for metrology with squeezing, showing that, similarly, one can generally attain a quadratic gain when comparing the resolution achievable by a squeezed probe to the best N-probe classical strategy achievable with the same energy. Namely, here we give a quantification of the Heisenberg squeezing bound for arbitrary estimation strategies that employ squeezing. Our theory recovers known results (e.g. in quantum optics and spin squeezing), but it uses the general theory of squeezing and holds for arbitrary quantum systems. The talk is based on the paper:
L. Maccone, A. Riccardi, Squeezing Metrology: a unified framework, Quantum 4, 292 (2020).