Finite time decoherence could be suppressed efficiently in photonic crystal

Details Finite time decoherence could be suppressed efficiently in photonic crystal Finite time decoherence could be suppressed efficiently in photonic crystal

2008-05-19

arxiv.org/abs/0805.2876v1

Physics

Quantum Physics

4 pages, 7 figures

Scientific paper

10.1103/PhysRevA.78.042320

The decoherence of two initially entangled qubits in anisotropic band gap photonic crystal has been studied analytically without Born or Markovian approximation. It is shown that the decoherence dynamics of two qubits in photonic crystal is greatly different from that of two qubits in vacuum or subjected to usual non-Markovian reservoir. The results also show that the finite time decoherence invoked by spontaneous emission could be suppressed efficiently and the entanglement of the Bell state possesses odd parity is more easily preserved in photonic crystal than that of the Bell state possesses even parity under the same condition. A store scheme for entangled particle pair is proposed.

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