Quantum Zeno effect in a nitrogen-vacancy center embedded in a spin bath

TL;DR

This paper investigates the quantum Zeno effect in a nitrogen-vacancy center within a spin bath, demonstrating how QZE can suppress decay processes and extend coherence times through numerical simulations.

Contribution

It introduces a novel application of the quantum Zeno effect to control decay in NV centers, supported by numerical evidence using the cluster-correlation expansion method.

Findings

QZE can effectively inhibit NV center decay

CCE method accurately models NV spin dynamics

Decoherence slowed down via quantum Zeno effect

Abstract

We study the longitudinal relaxation of a nitrogen-vacancy (NV) center surrounded by a $^{13}$C nuclear spin bath in diamond. By means of cluster-correlation expansion (CCE), we numerically demonstrate the decay process of electronic state induced by cross relaxation at low temperature. It is shown that the CCE method is not only capable of describing pure-dephasing effect at large-detuning regime, but it can also simulate the quantum dynamics of populations in the nearly resonant regime. We present a proposal to slow down the decay of NV center via implementing quantum Zeno effect (QZE). The numerical result shows that QZE can effectively inhibit the decay of NV center.