Geometric phase in open systems
arXiv:quant-ph/0301037 · doi:10.1103/PhysRevLett.90.160402
Abstract
We calculate the geometric phase associated to 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 source 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.
4 pages, 2 figures, RevTeX