Phys. Rev. Lett. 90, 160402 (2003) [4 pages]Geometric Phase in Open SystemsReceived 27 November 2002; published 23 April 2003 We calculate the geometric phase associated with the evolution of a system subjected to decoherence through a quantum-jump approach. The method is general and can be applied to many different physical systems. As examples, two main sources of decoherence are considered: dephasing and spontaneous decay. We show that the geometric phase is completely insensitive to the former, i.e., it is independent of the number of jumps determined by the dephasing operator. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.160402
DOI:
10.1103/PhysRevLett.90.160402
PACS:
03.65.Vf, 03.65.Yz
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