The dynamics of a qubit coupled strongly with a quantum oscillator

TL;DR

This paper investigates the behavior of a qubit strongly coupled with a quantum oscillator, introducing a refined perturbation approach to better understand the system's dynamics in this regime.

Contribution

It presents a novel analysis by incorporating non-degenerate perturbation into the strong coupling regime, extending previous models.

Findings

New analytical results for qubit-oscillator dynamics in strong coupling

Enhanced understanding of perturbation effects in quantum systems

Improved modeling accuracy for quantum information applications

Abstract

The dynamics of a qubit coupled with a quantum oscillator is re-studied in the region of strong coupling. The non-degenerate perturbation is added to the usual degenerate one and new results are given.