SWAP test and Hong-Ou-Mandel effect are equivalent
SWAP test and Hong-Ou-Mandel effect are equivalent
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DOI：
10.1103/physreva.87.052330
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发表时间：
2013-05-29
影响因子：
2.9
通讯作者：
Chamorro-Posada, Pedro
中科院分区：
文献类型：
--
作者：
Carlos Garcia-Escartin, Juan;Chamorro-Posada, Pedro
我们证明了量子光学中的Hong-Ou-Mandel效应等效于SWAP测试，SWAP测试是一种比较两个任意态的量子信息原语。我们首先推导了一个破坏性SWAP测试，它不需要在通常的量子电路中出现的辅助量子比特。然后，我们研究了两个光子在分束器相遇的Hong-Ou-Mandel效应，并证明它实际上是破坏性SWAP测试的光学实现。这个结果既提供了一个有趣的强大量子信息原语的简单实现，也提供了一种理解和分析Hong-Ou-Mandel效应的替代方法。
We show that the Hong-Ou-Mandel effect from quantum optics is equivalent to the SWAP test, a quantum information primitive which compares two arbitrary states. We first derive a destructive SWAP test that does not need the ancillary qubit that appears in the usual quantum circuit. Then we study the Hong-Ou-Mandel effect for two photons meeting at a beam splitter and prove it is, in fact, an optical implementation of the destructive SWAP test. This result offers both an interesting simple realization of a powerful quantum information primitive and an alternative way to understand and analyze the Hong-Ou-Mandel effect.