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The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra. Schrödinger...
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Related Experiment Video

Updated: May 29, 2026

Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Single-photon-level quantum memory at room temperature.

K F Reim1, P Michelberger, K C Lee

  • 1Clarendon Laboratory, University of Oxford, Oxford, United Kingdom. k.reim1@physics.ox.ac.uk

Physical Review Letters
|August 27, 2011
PubMed
Summary
This summary is machine-generated.

Researchers developed a room-temperature quantum memory using warm atomic cesium vapor. This efficient, easy-to-operate device stores and retrieves single-photon light pulses, crucial for quantum networks.

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Area of Science:

  • Quantum Information Science
  • Atomic Physics
  • Quantum Optics

Background:

  • Quantum memories are vital for long-distance quantum communication networks.
  • Future quantum repeaters require robust, accessible quantum memory devices.
  • Room-temperature operation is highly desirable for practical deployment.

Purpose of the Study:

  • To demonstrate a controllable and efficient quantum memory operating at room temperature.
  • To utilize warm atomic cesium vapor for quantum information storage.
  • To assess the quantum regime viability of a simple quantum memory scheme.

Main Methods:

  • Employed a far off-resonant Raman memory scheme.
  • Stored and retrieved weak coherent light pulses at the single-photon level.
  • Utilized warm atomic cesium vapor as the storage medium.

Main Results:

  • Achieved controllable, broadband storage and retrieval of single-photon pulses.
  • Demonstrated the quantum memory operates effectively in a room-temperature environment.
  • Showcased a low unconditional noise floor, suitable for quantum applications.

Conclusions:

  • A room-temperature, easy-to-operate quantum memory in atomic cesium vapor is feasible.
  • The demonstrated memory scheme is robust and efficient for quantum information processing.
  • This technology represents a significant step towards practical quantum networks.