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Related Experiment Video

Updated: Jun 14, 2026

Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Telecommunication-wavelength solid-state memory at the single photon level.

Björn Lauritzen1, Jirí Minár, Hugues de Riedmatten

  • 1Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland. bjorn.lauritzen@unige.ch

Physical Review Letters
|April 7, 2010
PubMed
Summary
This summary is machine-generated.

Researchers stored and retrieved single photons using a solid-state quantum memory. This breakthrough in photon echo technology advances quantum information science at telecommunication wavelengths.

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Area of Science:

  • Quantum Information Science
  • Solid-State Physics
  • Photonics

Background:

  • Quantum memories are crucial for quantum networks.
  • Storing single photons at telecommunication wavelengths is challenging.
  • Previous methods lacked efficiency or scalability.

Purpose of the Study:

  • To demonstrate a solid-state quantum memory for single photons.
  • To achieve storage and retrieval of weak coherent light fields.
  • To explore photon echo techniques for quantum applications.

Main Methods:

  • Utilized an erbium-doped Y2SiO5 crystal at 2.6 K.
  • Employed photon echoes with controlled reversible inhomogeneous broadening.
  • Applied an external field gradient using the linear Stark effect.

Main Results:

  • Successfully stored and retrieved single photon pulses for up to 600 ns.
  • Demonstrated controlled reversible inhomogeneous broadening at the single photon level for the first time.
  • Achieved on-demand retrieval of stored light fields.

Conclusions:

  • This experiment proves the feasibility of a solid-state quantum memory for single photons.
  • The developed technique is a significant step towards practical quantum information processing.
  • Solid-state quantum memories operating at telecommunication wavelengths are attainable.