Direct Measurement of a Nonlocal Entangled Quantum State
Direct Measurement of a Nonlocal Entangled Quantum State
复制标题
非局域纠缠量子态的直接测量
DOI：
10.1103/physrevlett.123.150402
复制
发表时间：
2019
影响因子：
8.6
通讯作者：
Guo Guang Can
中科院分区：
文献类型：
--
作者：
Pan Wei Wei;Xu Xiao Ye;Kedem Yaron;Wang Qin Qin;Chen Zhe;Jan Munsif;Sun Kai;Xu Jin Shi;Han Yong Jian;Li Chuan Feng;Guo Guang Can
Entanglement and the wave function description are two of the core concepts that make quantum mechanics such a unique theory. A method to directly measure the wave function, using weak values, was demonstrated by Lundeenet al.[Nature 474, 188 (2011)]. However, it is not applicable to a scenario of two disjoint systems, where nonlocal entanglement can be a crucial element, since that requires obtaining weak values of nonlocal observables. Here, for the first time, we propose a method to directly measure a nonlocal wave function of a bipartite system, using modular values. The method is experimentally implemented for a photon pair in a hyperentangled state, i.e., entangled both in polarization and momentum degrees of freedom.
