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WHAT: Quantum estimation and phase sensitivity

WHO: Yang Gao (PhD General Exam, LSU)

WHEN: 3:40PM MON 26 OCT

WHERE: 435 NICH

ABSTRACT:
We first review the (optimal) estimation theory and its application in quantum measurement. Several estimation methods are discussed, such as maximal likelihood method, optimal estimation, and etc. We focus on phase estimation in the Mach-Zedner interferometer. We discuss various quantum entangled states that can achieve the so-called Heisenberg limit in the sense of local sensitivity. As a contrast, the global sensitivity of phase estimation is defined. Last some further problems related with optimal estimation are outline briefly.