Nondestructive identification of the Bell diagonal state

Details Nondestructive identification of the Bell diagonal state Nondestructive identification of the Bell diagonal state

2011-11-17

arxiv.org/abs/1111.4038v1

Phys. Rev. A 83, 032109 (2011)

Physics

Quantum Physics

6 pages, 2 figures

Scientific paper

10.1103/PhysRevA.83.032109

We propose a scheme for identifying an unknown Bell diagonal state. In our scheme the measurements are performed on the probe qubits instead of the Bell diagonal state. The distinguished advantage is that the quantum state of the evolved Bell diagonal state ensemble plus probe states will still collapse on the original Bell diagonal state ensemble after the measurement on probe states, i.e. our identification is quantum-state nondestructive. It is also shown finally how to realize our scheme in the framework of cavity electrodynamics.

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