Geometric phase of a quantum dot system in nonunitary evolution
arXiv:0912.5245 · doi:10.1103/PhysRevA.79.044303
Abstract
Practical implementations of quantum computing are always done in the presence of decoherence. Geometric phase is useful in the context of quantum computing as a tool to achieve fault tolerance. Recent experimental progresses on coherent control of single electron have suggested that electron in quantum dot systems is a promising candidate of qubit in future quantum information processing devices. In this paper, by considering a feasible quantum dot model, we calculate the geometric phase of the quantum dot system in nonunitary evolution and investigate the effect of environment parameters on the phase value.
4 pages and 4 figures
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- Boundary-induced effect encoded in the corrections to the geometric phase acquired by a bipartite two-level system
- Interferometric and Uhlmann phases of mixed polarization states
- Polarimetric measurements of single-photon geometric phases