Geometric phase in open systems

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

References in corpus (3)

• The Quantum Jump Approach to Dissipative Dynamics in Quantum Optics
• Geometric phases for mixed states in interferometry
• Berry's Phase in the Presence of a Dissipative Medium

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