Phys. Rev. A 67, 022316 (2003) [9 pages]Entanglement gauge and the non-Abelian geometric phase with two photonic qubitsReceived 17 September 2002; published 28 February 2003 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. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.67.022316
DOI:
10.1103/PhysRevA.67.022316
PACS:
03.67.-a, 42.50.Dv, 03.65.Vf, 02.20.-a
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.