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<p>We demonstrate the preservation and manipulation of classical and quantum correlations in a system of qubits, each embedded in a cavity interacting with another cavity, forming an engineered quantum environment. We analyze qubit entropy, entanglement of formation, quantum discord, and classical correlation under Markovian and non-Markovian regimes. By tuning the inter-cavity coupling strength in weak- and strong-coupling regimes (W-CR and S-CR), correlations can be sustained, highlighting a key dynamical feature. In ideal, lossless cavities, high correlation levels persist throughout the evolution. These results offer insights into controlling correlations under optimal conditions. By selecting appropriate system parameters, correlations remain robust against decoherence, enabling long-term preservation. These findings have implications for quantum information processing, metrology, and secure communication technologies.</p>

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Long-time preservation of correlations through the interactions among cavities as engineered environments

  • 期刊论文

  • 发表日期：

    2025年7月10日

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  • K. Berrada,
  • H. Eleuch

摘要

We demonstrate the preservation and manipulation of classical and quantum correlations in a system of qubits, each embedded in a cavity interacting with another cavity, forming an engineered quantum environment. We analyze qubit entropy, entanglement of formation, quantum discord, and classical correlation under Markovian and non-Markovian regimes. By tuning the inter-cavity coupling strength in weak- and strong-coupling regimes (W-CR and S-CR), correlations can be sustained, highlighting a key dynamical feature. In ideal, lossless cavities, high correlation levels persist throughout the evolution. These results offer insights into controlling correlations under optimal conditions. By selecting appropriate system parameters, correlations remain robust against decoherence, enabling long-term preservation. These findings have implications for quantum information processing, metrology, and secure communication technologies.