Anti-Zeno Effect for Quantum Transport in Disordered Systems

TL;DR

This paper shows that repeated measurements can induce an anti-Zeno effect in disordered quantum systems, enhancing energy transfer and entanglement, with potential implications for understanding decoherence in biological systems.

Contribution

It demonstrates the anti-Zeno effect in disordered systems and links environmental decoherence to quantum transport enhancement and entanglement generation.

Findings

Repeated measurements can induce anti-Zeno effect in disordered systems.

Optimal measurement intervals maximize energy transfer efficiency.

Local decoherence can promote entanglement between distant sites.

Abstract

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.