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Quasi-light Storage for Optical Data Packets
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Distributed atomic quantum information processing via optical fibers.

Ming-Xing Luo1,2, Hui-Ran Li3, Xiaojun Wang4

  • 1Information Security and National Computing Grid Laboratory, Southwest Jiaotong University, Chengdu, 610031, China. mxluo@home.swjtu.edu.cn.

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Summary
This summary is machine-generated.

We demonstrate a reliable quantum gate for qudit systems, enabling flexible quantum information processing. This method is robust against common experimental errors, paving the way for advanced quantum computing.

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Area of Science:

  • Quantum Information Science
  • Atomic Physics
  • Quantum Optics

Background:

  • Quantum information processing utilizes quantum systems for computation.
  • Qudit systems offer enhanced flexibility compared to qubit systems.
  • Interactions between distant quantum systems are crucial for scalable quantum networks.

Purpose of the Study:

  • To investigate the realization of elementary quantum gates between two high-dimensional atoms (qudits).
  • To explore the coupling of distant cavities via an optical fiber for quantum information transfer.
  • To demonstrate a robust and reliable quantum gate operation.

Main Methods:

  • Utilizing two high-dimensional atoms in separate cavities.
  • Coupling the cavities through an optical fiber.
  • Employing controlled detuning to achieve a special swap gate.
  • Performing numerical simulations to assess gate fidelity and robustness.

Main Results:

  • Achieved a highly reliable special swap gate between distant qudits.
  • Demonstrated robustness against atomic spontaneous decay.
  • Confirmed resilience to photon leakage from cavities and optical fibers.
  • Identified appropriate experimental parameters for reliable gate operation.

Conclusions:

  • Elementary quantum gates for qudit systems are achievable between distant, coupled cavities.
  • The proposed swap gate is robust to significant experimental imperfections.
  • This work provides a viable pathway for scalable quantum information processing using qudit systems.