394 citations · 7.2k across the 232 of their papers we have counts for
12 papers · 2 filters
Quantum Capacity of Partially Corrupted Quantum Network
Masahito Hayashi, Seunghoan Song
We discuss a quantum network, in which the sender has outgoing channels, the receiver has incoming channels, each channel is of capacity , each intermediate node app…
Quantum state estimation with nuisance parameters
Jun Suzuki, Yuxiang Yang, Masahito Hayashi
In parameter estimation, nuisance parameters refer to parameters that are not of interest but nevertheless affect the precision of estimating other parameters of interest. For inst…
Verifiable Quantum Secure Modulo Summation
Masahito Hayashi, Takeshi Koshiba
We propose a new cryptographic task, which we call verifiable quantum secure modulo summation. Secure modulo summation is a calculation of modulo summation when $…
Application of the Resource Theory of Channels to Communication Scenarios
Ryuji Takagi, Kun Wang, Masahito Hayashi
We introduce a resource theory of channels relevant to communication via quantum channels, in which the set of constant channels --- useless channels for communication tasks --- is…
General framework for verifying pure quantum states in the adversarial scenario
Huangjun Zhu, Masahito Hayashi
Bipartite and multipartite entangled states are of central interest in quantum information processing and foundational studies. Efficient verification of these states, especially i…
Efficient Verification of Pure Quantum States in the Adversarial Scenario
Huangjun Zhu, Masahito Hayashi
Efficient verification of pure quantum states in the adversarial scenario is crucial to many applications in quantum information processing, such as blind measurement-based quantum…
Capacity of Quantum Private Information Retrieval with Collusion of All But One of Servers
Seunghoan Song, Masahito Hayashi
Quantum private information retrieval (QPIR) is a protocol in which a user retrieves one of multiple classical files by downloading quantum systems from non-communicating $\mathsf{…
Capacity of Quantum Private Information Retrieval with Multiple Servers
Seunghoan Song, Masahito Hayashi
We study the capacity of quantum private information retrieval (QPIR) with multiple servers. In the QPIR problem with multiple servers, a user retrieves a classical file by downloa…
Perfect Discrimination of Non-Orthogonal Separable Pure States on Bipartite System in General Probabilistic Theory
Hayato Arai, Yuuya Yoshida, Masahito Hayashi
We address perfect discrimination of two separable states. When available states are restricted to separable states, we can theoretically consider a larger class of measurements th…
Verifying commuting quantum computations via fidelity estimation of weighted graph states
Masahito Hayashi, Yuki Takeuchi
The instantaneous quantum polynomial time model (or the IQP model) is one of promising models to demonstrate a quantum computational advantage over classical computers. If the IQP…
Optimal Verification of Two-Qubit Pure States
Kun Wang, Masahito Hayashi
In a recent work [Phys. Rev. Lett. 120, 170502 (2018)], Pallister et al. proposed an optimal strategy to verify non-maximally entangled two-qubit pure states under the constraint t…
Optimal verification and fidelity estimation of maximally entangled states
Huangjun Zhu, Masahito Hayashi
We study the verification of maximally entangled states by virtue of the simplest measurement settings: local projective measurements without adaption. We show that optimal protoco…