Phase-kicked control of counter-rotating interactions in the quantum Rabi model

TL;DR

This paper introduces a phase-kicked control scheme for the quantum Rabi model that can enhance or suppress counter-rotating interactions by applying timed phase kicks, enabling dynamic manipulation of quantum states.

Contribution

The study proposes a novel phase-kicked control method to manipulate counter-rotating terms in the quantum Rabi model, including a phase matching condition for effective control.

Findings

Counter-rotating terms can be significantly enhanced with phase kicks.

Short interval kicks can suppress counter-rotating effects, enabling dynamical decoupling.

The scheme allows precise control of quantum dynamics in ultrastrong coupling regimes.

Abstract

We present an interaction scheme to control counter-rotating terms in the quantum Rabi model. We show that by applying a sequence of $\pi/2$ phase kicks to a two-level atom and a single mode quantized field, the natural dynamics of the Rabi model can be interrupted in a way that counter-rotating transitions can be significantly enhanced. This is achieved by a suitable timing of the phase kicks determined by a phase matching condition. If the time between successive kicks is sufficiently short, our scheme is turned into a dynamical decoupling problem in which the effects of counter-rotating terms can be strongly suppressed under ultrastrong coupling.