Department of Information Systems Engineering

Masakazu Yoshida

  (吉田 雅一)

Profile Information

Affiliation
Faculty of Design Technology Department of Information Systems Engineering, Osaka Sangyo University

J-GLOBAL ID
201301015290547766
researchmap Member ID
B000228949

External link

Papers

 17
  • Masakazu Yoshida, Gen Kimura
    Physical Review A, 106(2) 022408, Aug 10, 2022  Peer-reviewed
  • Masakazu Yoshida, Ayumu Nakayama, Jun Cheng
    Entropy, 22(11) 1275-1275, Nov 11, 2020  Peer-reviewed
    We introduce a quantum key distribution protocol using mean multi-kings’ problem. Using this protocol, a sender can share a bit sequence as a secret key with receivers. We consider a relation between information gain by an eavesdropper and disturbance contained in legitimate users’ information. In BB84 protocol, such relation is known as the so-called information disturbance theorem. We focus on a setting that the sender and two receivers try to share bit sequences and the eavesdropper tries to extract information by interacting legitimate users’ systems and an ancilla system. We derive trade-off inequalities between distinguishability of quantum states corresponding to the bit sequence for the eavesdropper and error probability of the bit sequence shared with the legitimate users. Our inequalities show that eavesdropper’s extracting information regarding the secret keys inevitably induces disturbing the states and increasing the error probability.
  • Kengo Shibata, Shan Lu, Masakazu Yoshida, Krishna R. Narayana, Jun Cheng
    Proc. of International Symposium on Information Theory and Its Applications, 28-31, Oct, 2018  Peer-reviewed
  • Ayumu Nakayama, Masakazu Yoshida, Jun Cheng
    Proc. of International Symposium on Information Theory and Its Applications, 339-343, Oct, 2018  Peer-reviewed
  • Masakazu Yoshida, Toru Kuriyama, Jun Cheng
    INTERNATIONAL JOURNAL OF QUANTUM INFORMATION, 14(8) 1650048, Dec, 2016  Peer-reviewed
    Mean king's problem is a kind of quantum state discrimination problems. In the problem, we try to discriminate eigenstates of noncommutative observables with the help of classical delayed information. The problem has been investigated from the viewpoint of error detection and correction. We construct higher-dimensional quantum error-correcting codes against error corresponding to the noncommutative observables. Any code state of the codes provides a way to discriminate the eigenstates correctly with the classical delayed information.

Books and Other Publications

 2

Major Teaching Experience

 33
  • Apr, 2017 - Mar, 2020
    a  (University of Nagasaki)

Professional Memberships

 3