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Quantum Studies Mathematics and Foundations

Geometric phase in open quantum system as a function of its history

T. S. Yakovleva, A. M. Rostom, V. A. Tomilin, Leonid V. Il'ichov

Published Jan 17, 2019• 3 citations
Publisher
DOI
10.1007/s40509-018-00179-x

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Geometric phases have been shown to be feasible in implementing quantum gates to perform quantum information processing. For all the realistic applications, the environmental influence on the geometric phase and decoherence such as memory effects must be properly considered in order to achieve the required precision in geometric quantum computation. In this paper, we study the geometric phase for a generic open quantum system based on a microscopic model. A remarkable feature of the open system's geometric phase obtained from our theoretical formulation is that the geometric phase can be obtained regardless of the existence of the master equations, while the environmental noise features such as memory effects are fully accounted for. We demonstrate that the geometric phases for a general open quantum system can be fundamentally modified by its non-Markovian environments.