Phase measurement at the Heisenberg limit with three photons

作     者：Haibo Wang Takayoshi Kobayashi 

作者机构：Core Research for Evolutional Science and Technology (CREST) Japan Science and Technology Corporation (JST) and Department of Physics Graduate School of Science University of Tokyo 7-3-1 Hongo Bunkyo Tokyo 113-0033 Japan 

出 版 物：《Physical Review A》 (物理学评论A辑：原子、分子和光学物理学)

年 卷 期：2005年第71卷第2期

页      面：021802(R)-021802(R)页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

主　　题：BROGLIE WAVELENGTH ENTANGLEMENT INTERFERENCE STATE 

摘      要：We describe an interferometer which is capable of measuring phase at a Heisenberg limit of 1∕3. The proposed interferometer, which consumes three indistinguishable photons, consists of two beam splitters with two-third reflectivity and two mirrors. It is shown that the oscillation period of the quantum interference is three times shorter than in the classical case and the interference visibility is 100%. A de Broglie wavelength given by λ0∕3 can then be observed in this scheme, where λ0 is the wavelength of a single photon. Compared with similar phase measurements [Mitchell et al., Nature (London) 429, 161 (2004); Walter et al., ibid. 429, 158 (2004)] by multiphoton maximally entangled states (MES), a three-photon MES is not generated in our proposal.