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Related Experiment Video

Updated: May 13, 2026

Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Reversible optical memory for twisted photons.

L Veissier1, A Nicolas, L Giner

  • 1Laboratoire Kastler Brossel, Université Pierre et Marie Curie, Ecole Normale Supérieure, CNRS, Paris, France.

Optics Letters
|March 5, 2013
PubMed
Summary
This summary is machine-generated.

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Scientists mapped light's orbital angular momentum (OAM) into cold atoms, demonstrating a quantum memory for OAM states. This enables storing quantum information using light's helical phase structure.

Area of Science:

  • Quantum optics
  • Atomic physics
  • Quantum information science

Background:

  • Orbital angular momentum (OAM) of light offers a unique degree of freedom for encoding information.
  • Storing quantum states of light in matter is crucial for quantum information processing and quantum networks.

Purpose of the Study:

  • To demonstrate the reversible mapping of light's orbital angular momentum (OAM) into a cold atomic ensemble at the single-photon level.
  • To investigate the preservation of the helical phase structure during storage and retrieval.
  • To explore the potential for storing quantum information encoded in OAM states.

Main Methods:

  • Utilized a dynamic electromagnetically induced transparency (EIT) protocol.
  • Employed Laguerre-Gaussian (LG) modes to represent OAM states.

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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

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Related Experiment Videos

Last Updated: May 13, 2026

Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

  • Stored and retrieved single-photon OAM states in a cold atomic ensemble.

    • Main Results:

    • Successfully mapped OAM states of light into a cold atomic ensemble and retrieved them.
    • Demonstrated reversible mapping with preserved handedness of the helical phase structure.
    • Achieved single-photon level fidelity in the OAM mapping process.

    Conclusions:

    • The demonstrated optical memory enables the storage of qubits encoded as superpositions of OAM states.
    • This capability facilitates multidimensional light-matter interfacing.
    • Opens new avenues for quantum information processing and quantum communication technologies.