2 citations · 7 across the 10 of their papers we have counts for
5 papers · 1 filter
Application of -order Information Metrics for Secure Communication in Quantum Physical Layer Design
Masahito Hayashi, Angeles Vázquez-Castro
Quantum physical layer security protocols offer significant advantages, particularly in space communications, but their achievable secrecy rates are often limited to the asymptotic…
Heisenberg scaling based on population coding
Masahito Hayashi
We study Heisenberg scaling of quantum metrology in the viewpoint of population coding. Although Fisher information has been used for a figure of merit to characterize Heisenberg s…
Measuring quantum relative entropy with finite-size effect
Masahito Hayashi
We study the estimation of relative entropy when is known. We show that the Cramér-Rao type bound equals the relative varentropy. Our estimator attains the Cramér-Rao…
Entanglement measures for detectability
Masahito Hayashi, Yuki Ito
We propose new entanglement measures as the detection performance based on the hypothesis testing setting. We clarify how our measures work for detecting an entangled state by exte…
Asymmetry activation and its relation to coherence under permutation operation
Masahito Hayashi
A Dicke state and its decohered state are invariant for permutation. However, when another qubits state to each of them is attached, the whole state is not invariant for permutatio…