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.