Quantum anti-Zeno effect in artificial quantum systems

Details Quantum anti-Zeno effect in artificial quantum systems Quantum anti-Zeno effect in artificial quantum systems

2010-03-24

arxiv.org/abs/1003.4587v1

Commun. Theor. Phys. 54, 985 (2010)

Physics

Quantum Physics

12 pages, 8 figures

Scientific paper

In this paper, we study a quantum anti-Zeno effect (QAZE) purely induced by repetitive measurements for an artificial atom interacting with a structured bath. This bath can be artificially realized with coupled resonators in one dimension and possesses photonic band structure like Bloch electron in a periodic potential. In the presence of repetitive measurements, the pure QAZE is discovered as the observable decay is not negligible even for the atomic energy level spacing outside of the energy band of the artificial bath. If there were no measurements, the decay would not happen outside of the band. In this sense, the enhanced decay is completely induced by measurements through the relaxation channels provided by the bath. Besides, we also discuss the controversial golden rule decay rates originated from the van Hove's singularities and the effects of the counter-rotating terms.

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