Hannover 2003 – wissenschaftliches Programm
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Q: Quantenoptik
Q 18: Quanteninformation 3
Q 18.4: Vortrag
Dienstag, 25. März 2003, 14:45–15:00, F102
Entanglement Gauge and Non-Abelian Geometric Phase for Photonic Qubits — •Karl-Peter Marzlin1, Stephen Bartlett2, and Barry C. Sanders2 — 1Universität Konstanz — 2Macquarie University, Sydney
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 bi-partite state of two separated spatial modes can acquire a non-Abelian geometric phase.