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<p>We investigate the dynamics of nonlocal quantum correlations in one-axis-twisted atom–cavity states under dephasing noise and a Gaussian-modulated coherent drive. Using the Lindblad master-equation approach, we analyze the evolution of concurrence and local quantum uncertainty, where the latter captures discord-type quantum correlations beyond entanglement. By varying the pulse width, drive amplitude and phase, twisting strength, Kerr nonlinearity, atom–cavity coupling, longitudinal interaction, and dissipation rates, we identify parameter regimes that enhance the robustness of quantum correlations. The results show that broader Gaussian pulses significantly improve the preservation of both entanglement and discord-type correlations, while suitable nonlinear and coupling strengths promote partial revivals and stronger resistance to decoherence. These findings provide useful insight into the control of nonlocal quantum features in driven open systems and may be relevant for cavity- and circuit-QED implementations.</p>

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Dynamics of Non-local Features in One-Axis Twisting States under Dephasing Noise with Gaussian-Modulated Drive

  • 期刊论文

  • 发表日期：

    2026年3月31日

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  • Muhammad Noman,
  • Ramita Sarkar,
  • Khushnood Shah,
  • Aqsa Mushtaq,
  • S. M. Zangi

摘要

We investigate the dynamics of nonlocal quantum correlations in one-axis-twisted atom–cavity states under dephasing noise and a Gaussian-modulated coherent drive. Using the Lindblad master-equation approach, we analyze the evolution of concurrence and local quantum uncertainty, where the latter captures discord-type quantum correlations beyond entanglement. By varying the pulse width, drive amplitude and phase, twisting strength, Kerr nonlinearity, atom–cavity coupling, longitudinal interaction, and dissipation rates, we identify parameter regimes that enhance the robustness of quantum correlations. The results show that broader Gaussian pulses significantly improve the preservation of both entanglement and discord-type correlations, while suitable nonlinear and coupling strengths promote partial revivals and stronger resistance to decoherence. These findings provide useful insight into the control of nonlocal quantum features in driven open systems and may be relevant for cavity- and circuit-QED implementations.