Enhancing light-matter coupling for exploring chaos in the quantum Rabi model

• URL: http://arxiv.org/abs/2603.09114v1
• Date: Tue, 10 Mar 2026 02:47:43 GMT
• Title: Enhancing light-matter coupling for exploring chaos in the quantum Rabi model
• Abstract summary: We use an anti-squeezing transformation to the bosonic field to map a weakly coupled, two-photon driven Jaynes-Cummings model (JCM) to an effective deep-strong-coupling QRM.<n>We numerically probe chaos in this coupling-enhanced platform and observe the similar chaotic phenomena as in the ideal QRM.<n>This establishes coupling-enhanced method as a practical approach to study QRM chaos without requiring intrinsic ultra-strong coupling.
• Score: 14.103376385847888
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Accessing chaos in the quantum Rabi model (QRM) usually requires operating far from resonance, combined with ultra- or deep-strong light-matter coupling. This makes direct experiments challenging. In this manuscript, we propose a solution to this challenge by employing an anti-squeezing transformation to the bosonic field. Specifically, we demonstrate that this transformation maps a weakly coupled, two-photon driven Jaynes-Cummings model (JCM) to an effective deep-strong-coupling QRM in the squeezed-light frame. Using out-of-time-order correlator, Husimi distribution, and linear entanglement entropy, we numerically probe chaos in this coupling-enhanced platform and observe the similar chaotic phenomena as in the ideal QRM. We also find the coupling-enhanced model can drive the system deeper into the chaotic regime. This establishes coupling-enhanced method as a practical approach to study QRM chaos without requiring intrinsic ultra-strong coupling.

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