Photon engineering for quantum information processing

被引：0
|
作者：
U'Ren, AB [1 ]
Banaszek, K [1 ]
Walmsley, IA [1 ]
机构：
[1] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England
来源：
QUANTUM INFORMATION & COMPUTATION | 2003年 / 3卷
关键词：
parametric down-conversion; polarization-entanglement; quantum communication; Bell state measurement; optical quantum computing;
D O I：
暂无
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
We study distinguishing information in the context of quantum interference involving more than one parametric downconversion (PDC) source and in the context of generating polarization-entangled photon pairs based on PDC. We arrive at specific design criteria for two-photon sources so that when used as part of complex optical systems, such as photon-based quantum information processing schemes, distinguishing information between the photons is eliminated guaranteeing high visibility interference. We propose practical techniques which lead to suitably engineered two-photon states that can be realistically implemented with available technology. Finally, we study an implementation of the nonlinear-sign shift (NS) logic gate with PDC sources and show the effect of distinguishing information on the performance of the gate.
引用
收藏
页码：480 / 502
页数：23
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