Quantum Zeno effect and parametric resonance in mesoscopic physics

TL;DR

This paper explores how the quantum Zeno effect and parametric resonance influence electron tunneling in quantum dots, proposing experiments to observe these phenomena through electric transport measurements.

Contribution

It introduces a novel experimental setup to observe both the quantum Zeno effect and parametric resonance in mesoscopic electron transport.

Findings

Decoherence suppresses tunneling in quantum dots.

AC-driven detector induces parametric resonance.

Proposed experiment can observe both effects in electric transport.

Abstract

As a realization of the quantum Zeno effect, we consider electron tunneling between two quantum dots with one of the dots coupled to a quantum point contact detector. The coupling leads to decoherence and to the suppression of tunneling. When the detector is driven with an ac voltage, a parametric resonance occurs which strongly counteracts decoherence. We propose a novel experiment with which it is possible to observe both the quantum Zeno effect and the parametric resonance in electric transport.