Publications

Conference Papers

  • Quantum Secret Sharing Schemes and Reversibility of Quantum Operations
    Author(s)
    T. Ogawa, A. Sasaki, M. Iwamoto, and H. Yamamoto
    Conference
    ISITA 2004
    Pages
    1440–1445
    Publication Year
    2004
    Date Presented
    Oct., 2004
    Abstract

    Quantum secret sharing schemes encrypting a quantum state into a multipartite entangled state are treated. The lower bound on the dimension of each share given by Gottesman [Phys. Rev. A 61, 042311 (2000)] is revisited based on a relation between the reversibility of quantum operations and the Holevo information. We also propose a threshold ramp quantum secret sharing scheme and evaluate its coding efficiency.