Zeno-anti-Zeno crossover via external fields in a one-dimensional coupled-cavity waveguide

TL;DR

This paper investigates how external periodic fields influence the quantum Zeno and anti-Zeno effects in a one-dimensional coupled-cavity waveguide with a two-level system, revealing controllable crossover behavior.

Contribution

It introduces a method to analyze the Zeno-anti-Zeno crossover in a driven hybrid quantum system using Floquet-Green's functions and extended Hilbert space formalism.

Findings

Crossover controlled by drive intensity and frequency.

The detuning affects the Zeno-anti-Zeno transition.

External fields enable tunable quantum decay dynamics.

Abstract

We have studied a hybrid system of a one-dimensional coupled-cavity waveguide with a two-level system inside, which subject to a external periodical field. Using the extended Hilbert space formalism, the time-dependent Hamiltonian is reduced into an equivalent time-independent one. Via computing the Floquet-Green's function, the Zeno-anti-Zeno crossover is controlled by the driven intensity and frequency, and the detuning between the cavity and the two-level system.