Three-qubit topological phase on entangled photon pairs

被引：13
|
作者：
Johansson, Markus [1 ]
Khoury, Antonio Z. [2 ]
Singh, Kuldip [1 ]
Sjoqvist, Erik [1 ,3 ]
机构：
[1] Natl Univ Singapore, Ctr Quantum Technol, Singapore 117543, Singapore
[2] Univ Fed Fluminense, Inst Fis, BR-24210346 Niteroi, RJ, Brazil
[3] Uppsala Univ, Dept Quantum Chem, SE-75120 Uppsala, Sweden
来源：
PHYSICAL REVIEW A | 2013年 / 87卷 / 04期
基金：
新加坡国家研究基金会;
关键词：
ORBITAL ANGULAR-MOMENTUM; LIGHT;
D O I：
10.1103/PhysRevA.87.042112
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose an experiment to observe the topological phases associated with cyclic evolutions, generated by local SU(2) operations, on three-qubit entangled states prepared on different degrees of freedom of entangled photon pairs. The topological phases reveal the nontrivial topological structure of the local SU(2) orbits. We describe how to prepare states showing different topological phases and discuss their relation to entanglement. In particular, the presence of a pi/2 phase shift is a signature of genuine tripartite entanglement in the sense that it does not exist for two-qubit systems. DOI: 10.1103/PhysRevA.87.042112
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页数：9
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