8 papers · 1 filter
The existance of unconditionally secure quantum bit commitment
Chuan-Feng Li, Guang-Can Guo
This paper has been withdrawn by the author(s).The scheme presented is insecure.
Unconditionally Secure Quantum Coin Tossing via Entanglement Swapping
Yong-Sheng Zhang, Chuan-Feng Li, Guang-Can Guo
An unconditionally secure quantum cion tossing protocol for two remote participants via entangled swapping is presented. The security of this protocol is guaranteed by the nonlocal…
Quantum authentication using entangled state
Yong-Sheng Zhang, Chuan-Feng Li, Guang-Can Guo
A scheme of quantum authentication is presented. Two parties share Einstein-Podolsky-Rosen (EPR) pairs previously as the authentication key which servers as encoder and decoder. Th…
Conditions for manipulation of a set of entangled pure states
Chuan-Wei Zhang, Chuan-Feng Li, Guang-Can Guo
We derive a sufficient condition for a set of pure states, each entangled in two remote -dimensional systems, to be transformable to -dimensional-subspace equivalent entangle…
Universal Quantum Entanglement Concentration Gate
Zi-Yang Wang, Chuan-Wei Zhang, Chuan-Feng Li +1
We construct a Universal Quantum Entanglement Concentration Gate (QEC-Gate). Special times operations of QEC-Gate can transform a pure 2-level bipartite entangled state to nearly m…
Optical Realization of Quantum Gambling Machine
Yong-Sheng Zhang, Chuan-Feng Li, Wan-Li Li +2
Quantum gambling --- a secure remote two-party protocol which has no classical counterpart --- is demonstrated through optical approach. A photon is prepared by Alice in a superpos…