Anti-Zeno Effect for Quantum Transport in Disordered Systems

Details Anti-Zeno Effect for Quantum Transport in Disordered Systems Anti-Zeno Effect for Quantum Transport in Disordered Systems

2010-03-09

arxiv.org/abs/1003.1804v2

Phys. Rev. A 82, 042109 (2010)

Physics

Quantum Physics

5pages, 3 figures; v2: published version

Scientific paper

10.1103/PhysRevA.82.042109

We demonstrate that repeated measurements in disordered systems can induce quantum anti-Zeno effect under certain condition to enhance quantum transport. The enhancement of energy transfer is really exhibited with a simple model under repeated measurements. The optimal measurement interval for the anti-Zeno effect and the maximal efficiency of energy transfer are specified in terms of the relevant physical parameters. Since the environment acts as frequent measurements on the system, the decoherence-induced energy transfer, which has been discussed recently for photosynthetic complexes, may be interpreted in terms of the anti-Zeno effect. We further find an interesting phenomenon, where local decoherence or repeated measurements may even promote entanglement generation between the non-local sites.

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