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Related Experiment Video

Updated: May 31, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
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Published on: March 30, 2017

Remote entanglement between a single atom and a Bose-Einstein condensate.

M Lettner1, M Mücke, S Riedl

  • 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, 85748 Garching, Germany.

Physical Review Letters
|June 25, 2011
PubMed
Summary

Researchers created remote entanglement between a single atom and a Bose-Einstein condensate (BEC). This hybrid quantum system achieved 95% fidelity, advancing quantum information science.

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Last Updated: May 31, 2026

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Area of Science:

  • Quantum physics
  • Quantum information science
  • Atomic physics

Background:

  • Remote entanglement is crucial for building quantum networks.
  • Previous methods faced challenges in maintaining entanglement over distances.

Purpose of the Study:

  • To experimentally generate remote entanglement between a single atom and a Bose-Einstein condensate (BEC).
  • To establish and measure the fidelity and lifetime of this hybrid matter-matter entanglement.

Main Methods:

  • Generating atom-photon entanglement from a single atom in an optical cavity.
  • Transporting the photon to a BEC and converting it into a collective excitation.
  • Converting the matter-matter entanglement into photon-photon entanglement after a delay.

Main Results:

  • Successfully generated remote entanglement between a single atom and a BEC.
  • Achieved a matter-matter entanglement fidelity of 95%.
  • Demonstrated a matter-matter entanglement lifetime of 100 μs, significantly longer than photon duration.

Conclusions:

  • This hybrid atom-BEC system is a promising platform for quantum information processing.
  • The achieved entanglement fidelity and lifetime pave the way for robust quantum networks.
  • The experimental demonstration opens new avenues for scalable quantum technologies.