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Optical Quantum Memory on Macroscopic Coherence.

S A Moiseev1, K I Gerasimov1, M M Minnegaliev1

  • 1Kazan National Research Technical University n.a. A.N. Tupolev-KAI, Kazan Quantum Center, 10 Karl Marx street, 420111 Kazan, Russia.

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|March 7, 2025
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Summary
This summary is machine-generated.

We introduce a novel quantum memory utilizing pre-created quantum coherence for enhanced performance. This method allows for low-noise storage and on-demand retrieval of light fields, advancing optical quantum memory development.

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Area of Science:

  • Quantum physics
  • Quantum optics
  • Materials science

Background:

  • Quantum memory is crucial for quantum information processing.
  • Existing quantum memories face challenges with noise and retrieval efficiency.
  • Macroscopic quantum coherence offers potential for improved quantum storage.

Purpose of the Study:

  • To propose a new quantum memory design utilizing pre-created quantum coherence.
  • To demonstrate improved storage and retrieval properties.
  • To explore the feasibility of the proposed memory in different physical systems.

Main Methods:

  • Utilizing pre-created long-lived macroscopic quantum coherence.
  • Employing atomic ensembles with natural inhomogeneous broadening.
  • Investigating implementation in rare-earth-doped crystals and atomic gases.

Main Results:

  • Achieved low quantum noise during storage.
  • Demonstrated programmable and on-demand retrieval of signal light fields.
  • Showcased new physical properties and improved quantum memory parameters.

Conclusions:

  • The proposed quantum memory offers enhanced performance and novel retrieval methods.
  • Pre-created coherence is a viable pathway for developing advanced optical quantum memory.
  • The approach is feasible in diverse physical systems like doped crystals and atomic gases.