<p>Non-classical correlations, quantified by uncertainty measures such as Local Quantum Uncertainty (LQU) and Quantum Interferometric Power (QIP), are vital resources in quantum information, existing even in non-entangled mixed states. This study investigates the quantum correlations of Bell cat states under amplitude damping, employing LQU and QIP as quantifiers. This work investigates the dynamics of these correlations in two-mode Bell cat states under the influence of amplitude damping noise. We derive analytic expressions for both LQU and QIP for these states, which are constructed from Glauber coherent states. Furthermore, the study explores the potential of these correlations for enhancing phase estimation precision in quantum metrology. We also analyze the resilience of non-classical correlations, quantified by LQU, in Bell cat states subject to phase damping, depolarizing, and phase reversal channels. Our results provide crucial insights into the robustness and utility of these correlations, highlighting their significance for quantum information processing and communication.</p>

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Quantum Interferometric Power Versus Local Quantum Uncertainty in Bell Coherent States Under Amplitude Damping

  • H. Saidi,
  • M. El Kirdi,
  • A. Slaoui,
  • H. El Hadfi,
  • R. Ahl Laamara

摘要

Non-classical correlations, quantified by uncertainty measures such as Local Quantum Uncertainty (LQU) and Quantum Interferometric Power (QIP), are vital resources in quantum information, existing even in non-entangled mixed states. This study investigates the quantum correlations of Bell cat states under amplitude damping, employing LQU and QIP as quantifiers. This work investigates the dynamics of these correlations in two-mode Bell cat states under the influence of amplitude damping noise. We derive analytic expressions for both LQU and QIP for these states, which are constructed from Glauber coherent states. Furthermore, the study explores the potential of these correlations for enhancing phase estimation precision in quantum metrology. We also analyze the resilience of non-classical correlations, quantified by LQU, in Bell cat states subject to phase damping, depolarizing, and phase reversal channels. Our results provide crucial insights into the robustness and utility of these correlations, highlighting their significance for quantum information processing and communication.