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Extremal quantum correlation generation using a hybrid channel.

Atta Ur Rahman1, Hazrat Ali2, S M Zangi3

  • 1School of Physics, University of Chinese Academy of Science, Yuquan Road 19A, Beijing, 100049, China.

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|October 3, 2023
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Summary
This summary is machine-generated.

Designing a hybrid quantum channel with a cavity, super-Gaussian beam, and dephasing preserves and generates quantum correlations. This configuration effectively suppresses disorder and enhances entanglement preservation.

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Area of Science:

  • Quantum Information Science
  • Quantum Optics
  • Quantum Communication

Background:

  • Preserving quantum correlations is crucial for quantum information processing.
  • Designing optimal quantum channels is essential for robust quantum communication.

Purpose of the Study:

  • To design and analyze a hybrid quantum channel for preserving quantum correlations.
  • To investigate the role of a single-mode cavity, super-Gaussian beam, and local dephasing in maintaining quantum characteristics.

Main Methods:

  • Utilized two-level atoms to study quantum dynamics.
  • Employed traced-distance discord, concurrence, and local-quantum uncertainty to quantify correlations.
  • Analyzed entropy suppression using linear entropy.

Main Results:

  • The hybrid channel preserves and generates quantum correlations, even with local dephasing.
  • Maximal quantum correlations and complete disorder suppression were achieved within specific limits.
  • Mixing Fock state cavity, super-Gaussian beam, and local dephasing prolongs quantum correlation preservation.

Conclusions:

  • The proposed hybrid channel is a resourceful method for prolonged quantum correlation preservation.
  • An interrelationship between two-qubit correlation functions was established, highlighting deviations from maximal entanglement.