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<p>In this study, we delve into the critical quantum phenomena of the two-photon Rabi-Stark model (<i>2pRSM</i>), thereby establishing a foundational basis for the development of more effective and scalable quantum sensing technologies. Our analysis explores how variations in coupling strengths and Stark coupling parameters influence the quantum dynamics within the system. Through a detailed numerical investigation, we uncover the phenomenon of spectral collapse in the <i>2pRSM</i>, analyzing its dependence on the qubit-cavity field coupling strength to provide further physical insights. We further employ the Wigner function as a tool to visualize and quantify the system’s non-classical characteristics, highlighting the ground state’s negativity as an indicator of its quantum characteristics. Additionally, the dynamics of entanglement are rigorously investigated across a range of Stark coupling strengths using von Neumann entropy, thereby emphasizing the pivotal role of Stark interactions in modulating quantum entanglement. By clarifying these fundamental quantum features, our work bridges theoretical insights with practical implications, establishing a solid foundation for advancements in quantum information science and enabling transformative applications in quantum sensing and related fields.</p>

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Quantum entanglement in two-photon Rabi Stark model

  • 期刊论文

  • 发表日期：

    2025年5月8日

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  • Zakaria Boutakka,
  • Zoubida Sakhi,
  • Mohamed Bennai

摘要

In this study, we delve into the critical quantum phenomena of the two-photon Rabi-Stark model (2pRSM), thereby establishing a foundational basis for the development of more effective and scalable quantum sensing technologies. Our analysis explores how variations in coupling strengths and Stark coupling parameters influence the quantum dynamics within the system. Through a detailed numerical investigation, we uncover the phenomenon of spectral collapse in the 2pRSM, analyzing its dependence on the qubit-cavity field coupling strength to provide further physical insights. We further employ the Wigner function as a tool to visualize and quantify the system’s non-classical characteristics, highlighting the ground state’s negativity as an indicator of its quantum characteristics. Additionally, the dynamics of entanglement are rigorously investigated across a range of Stark coupling strengths using von Neumann entropy, thereby emphasizing the pivotal role of Stark interactions in modulating quantum entanglement. By clarifying these fundamental quantum features, our work bridges theoretical insights with practical implications, establishing a solid foundation for advancements in quantum information science and enabling transformative applications in quantum sensing and related fields.