摘要
In this paper,we present an efficient purification scheme that improves the efficiency of entanglement purification of the recently proposed entanglement purification scheme for doubly entangled photon states (Phys.Rev.A,2008,77:042315).This modified scheme contains the bit-flip error correction where all the photon pairs can be kept while all the bit-flip errors are corrected and the entanglement purification of phase-flip errors where a wavelength conversion process is used.This scheme has the advantage of high efficiency and a much lower minimum fidelity of the original state.It works under existing technology.
In this paper, we present an efficient purification scheme that improves the efficiency of entanglement purification of the recently proposed entanglement purification scheme for doubly entangled photon states (Phys. Rev. A, 2008, 77: 042315). This modified scheme contains the bit-flip error correction where all the photon pairs can be kept while all the bit-flip errors are corrected and the entanglement purification of phase-flip errors where a wavelength conversion process is used. This scheme has the advantage of high efficiency and a much lower minimum fidelity of the original state. It works under existing technology.
基金
Supported by the National Natural Science Foundation of China(Grant Nos.10604008,10874098,10775076)
the National Fundamental Research Program of China(Grant No.2006CB921106)
