Linear optics controlled-phase gate made simple

被引：239

作者：

Kiesel, N ^{[1
]}

Schmid, C

Weber, U

Ursin, R

Weinfurter, H

机构：

[1] Max Planck Inst Quantum Opt, D-85748 Garching, Germany

[2] Univ Munich, Dept Phys, D-80797 Munich, Germany

[3] Univ Vienna, Inst Expt Phys, A-1090 Vienna, Austria

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.95.210505

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Linear optics quantum logic gates are the best tool to generate multiphoton entanglement. Simplifying a recent approach [Phys. Rev. A 65, 062324 (2002); 66, 024308 (2002); Nature (London) 426, 264 (2003); Phys. Rev. Lett. 93, 080502 (2004)], we were able to implement the conditional phase gate with only one second-order interference at a polarization dependent beam splitter, thereby significantly increasing its stability. The improved quality of the gate is evaluated by analyzing its entangling capability and by performing full process tomography. The achieved results ensure that this device is well suited for implementation in various multiphoton quantum information protocols.

引用

页数：4

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