394 citations · 7.2k across the 232 of their papers we have counts for
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Fourier Analytic Approach to Quantum Estimation of Group Action
Masahito Hayashi
This article proposes a unified method to estimation of group action by using the inverse Fourier transform of the input state. The method provides optimal estimation for commutati…
A Hierarchy of Information Quantities for Finite Block Length Analysis of Quantum Tasks
Marco Tomamichel, Masahito Hayashi
We consider two fundamental tasks in quantum information theory, data compression with quantum side information as well as randomness extraction against quantum side information. W…
Irreversibility of Entanglement Concentration for Pure State
Wataru Kumagai, Masahito Hayashi
For a pure state on a composite system , both the entanglement cost and the distillable entanglement coincide with the von…
Precise evaluation of leaked information with universal2 privacy amplification in the presence of quantum attacker
Masahito Hayashi
We treat secret key extraction when the eavesdropper has correlated quantum states. We propose quantum privacy amplification theorems different from Renner's, which are based on qu…
Quantum wiretap channel with non-uniform random number and its exponent and equivocation rate of leaked information
Masahito Hayashi
A usual code for quantum wiretap channel requires an auxiliary random variable subject to the perfect uniform distribution. However, it is difficult to prepare such an auxiliary ra…
Large deviation analysis for quantum security via smoothing of Renyi entropy of order 2
Masahito Hayashi
It is known that the security evaluation can be done by smoothing of Rényi entropy of order 2 in the classical and quantum settings when we apply universal hash functions. Usin…