394 citations · 7.2k across the 232 of their papers we have counts for
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Multi-copy and stochastic transformation of multipartite pure states
Lin Chen, Masahito Hayashi
Characterizing the transformation and classification of multipartite entangled states is a basic problem in quantum information. We study the problem under two most common environm…
Phase estimation with photon number constraint
Masahito Hayashi
Many researches proposed the use of the noon state as the input state for phase estimation, which is one topic of quantum metrology. This is because the input noon state provides t…
Tight exponential analysis of universally composable privacy amplification and its applications
Masahito Hayashi
Motivated by the desirability of universal composability, we analyze in terms of L_1 distinguishability the task of secret key generation from a joint random variable. Under this s…
Strong security and separated code constructions for the broadcast channels with confidential messages
Ryutaroh Matsumoto, Masahito Hayashi
We show that the capacity region of the broadcast channel with confidential messages does not change when the strong security criterion is adopted instead of the weak security crit…
Comparison between the Cramer-Rao and the mini-max approaches in quantum channel estimation
Masahito Hayashi
In a unified viewpoint in quantum channel estimation, we compare the Cramer-Rao and the mini-max approaches, which gives the Bayesian bound in the group covariant model. For this p…
Additivity and non-additivity of multipartite entanglement measures
Huangjun Zhu, Lin Chen, Masahito Hayashi
We study the additivity property of three multipartite entanglement measures, i.e. the geometric measure of entanglement (GM), the relative entropy of entanglement and the logarith…