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quant-ph2023
Adaptive quantum state estimation for two optical point sources
Masataka Kimizu, Fuyuhiko Tanaka, Akio Fujiwara
In classical optics, there is a well-known resolution limit, called Rayleigh's curse, in the separation of two incoherent optical sources in close proximity. Recently, Tsang et al.…
quant-ph2023
Autoparallelity of Quantum Statistical Manifolds in Light of Quantum Estimation Theory
Hiroshi Nagaoka, Akio Fujiwara
In this paper we study the autoparallelity w.r.t. the e-connection for an information-geometric structure called the SLD structure, which consists of a Riemannian metric and mutual…
quant-ph2017★ 1 cited
Noncommutative Lebesgue decomposition with application to quantum local asymptotic normality
Akio Fujiwara, Koichi Yamagata
We develop a theory of local asymptotic normality in the quantum domain based on a noncommutative extension of the Lebesgue decomposition. This formulation gives a substantial gene…