Identifying two-photon high-dimensional entanglement in transverse patterns
- 作者：Gui-Fang Dang ; Li-Ping Deng and Kaige Wang
- 关键词：Two-photon interference ; Two-photon entanglement ; Nonclassical interferometry
- 刊名：Physics Letters A
- 出版年：2006
- 期刊代码：57_03759601
- 类别：ph
- 出版时间：4 December 2006
- 卷：359
- 期：5
- 页码：412-415
- 文件大小：154 K
摘要
We propose a scheme to explore two-photon high-dimensional entanglement associated with a transverse pattern by means of two-photon interference at a beamsplitter. We find that the topological symmetry of the angular spectrum of the two-photon state governs the nature of the two-photon interference. We prove that the anti-coalescence interference is the signature of two-photon entanglement. On the basis of this feature, we propose a special Mach–Zehnder interferometer incorporated with two spiral phase plates which can change the interference from a coalescence to an anti-coalescence type only for a two-photon entangled state. The scheme is simple and straightforward compared with the test for a Bell inequality.