Entanglement gauge and the non-Abelian geometric phase with two photonic qubits

作     者：Karl-Peter Marzlin Stephen D. Bartlett Barry C. Sanders 

作者机构：Department of Physics and Centre for Advanced Computing—Algorithms and Cryptography Macquarie University Sydney New South Wales 2109 Australia Fachbereich Physik der Universität Konstanz Postfach 5560 M674 D-78457 Konstanz Germany 

出 版 物：《Physical Review A》 (Phys Rev A)

年 卷 期：2003年第67卷第2期

页      面：022316-022316页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

主　　题：Quantum theory 

摘      要：We introduce the entanglement gauge describing the combined effects of local operations and nonlocal unitary transformations on bipartite quantum systems. The entanglement gauge exploits the invariance of nonlocal properties for bipartite systems under local (gauge) transformations. This new formalism yields observable effects arising from the gauge geometry of the bipartite system. In particular, we propose a non-Abelian gauge theory realized via two separated spatial modes of the quantized electromagnetic field manipulated by linear optics. In this linear optical realization, a bipartite state of two separated spatial modes can acquire a non-Abelian geometric phase.