Polarization-Entanglement Purification for Ideal Sources Using Weak Cross-Kerr Nonlinearity
作者： Cong Cao , Chuan Wang , Ling-yan He , Ru Zhang
DOI: 10.1007/S10773-012-1441-Y
关键词:
摘要: We propose an entanglement purification protocol (EPP) for ideal entangled photon sources resorting to weak cross-Kerr nonlinearities. The key element of this EPP is the quantum nondemolition detector (QND) which uses nonlinearity effect generate phase shifts on coherent states conditionally. By exploiting double cross-phase modulation (XPM) method in QND, we present efficient protocol, reduces requirement coupling strength medium. proposed may open up promising possibilities practicability information processing using
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