Phase-preserving control of Floquet-engineered cavity quantum electrodynamics
Phys. Rev. A 113, 043722 – Published 14 April, 2026
DOI: https://doi.org/10.1103/j3b1-cyjc
Abstract
We propose a Floquet-engineered framework for the coherent control of the light-matter interaction in a two-level system (TLS) located in a time-modulated cavity. Strictly phase-preserving operation of the TLS-cavity interaction is demonstrated, allowing the interruption and retrieval of coherent Rabi oscillations without the loss of quantum information. By introducing a phonon reservoir, it is proved that the frequency instability induced by non-Markovian processes does not produce significant phase decoherence during Floquet modulation. Our results provide insights into the fundamental physics of a driven quantum system and establish Floquet engineering as a powerful tool for coherent quantum information processing.
