Demonstration of an optical quantum controlled-NOT gate without path interference
Demonstration of an optical quantum controlled-NOT gate without path interference
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DOI：
10.1103/physrevlett.95.210506
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发表时间：
2005-11-18
影响因子：
8.6
通讯作者：
Sasaki, K
中科院分区：
文献类型：
--
作者：
Okamoto, R;Hofmann, HF;Sasaki, K
我们报告了第一个没有任何路径干扰的光量子控制非门的实验演示，其中两个相互作用的路径干涉仪的原始建议[物理。中国生物医学工程学报（英文版）；[65, 062324(2002)]已经被三个部分偏振光分束器取代，它们具有合适的偏振相关的透射率和反射率。该器件的性能是使用最近提出的方法[物理学]来评估的。Rev. Lett. 94, 160504(2005)]，通过该方法可以从两个经典真值表的32个测量结果中估计量子过程保真度和纠缠能力，明显少于完整量子层析成像所需的256个测量结果。
We report the first experimental demonstration of an optical quantum controlled-NOT gate without any path interference, where the two interacting path interferometers of the original proposals [Phys. Rev. A 66, 024308 (2002); 65, 062324 (2002)] have been replaced by three partially polarizing beam splitters with suitable polarization dependent transmittances and reflectances. The performance of the device is evaluated using a recently proposed method [Phys. Rev. Lett. 94, 160504 (2005)], by which the quantum process fidelity and the entanglement capability can be estimated from the 32 measurement results of two classical truth tables, significantly less than the 256 measurement results required for full quantum tomography.