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Atom-atom entanglement by single-photon detection.

L Slodička1, G Hétet, N Röck

  • 1Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria.

Physical Review Letters
|March 12, 2013
PubMed
Summary
This summary is machine-generated.

Researchers entangled distant atomic ions using quantum interference and single-photon detection. This method achieves high-fidelity entanglement, paving the way for quantum information processing.

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Area of Science:

  • Quantum physics
  • Atomic physics
  • Quantum information science

Background:

  • Entangling distant quantum systems is crucial for quantum networks.
  • Previous theoretical proposals outlined methods for remote entanglement.
  • Experimental realization of such protocols is a significant challenge.

Purpose of the Study:

  • To experimentally demonstrate a scheme for entangling distant atomic ions.
  • To achieve high-fidelity entanglement between trapped ions.
  • To verify the proposed quantum interference protocol.

Main Methods:

  • Utilizing quantum interference of scattered photons.
  • Employing laser-cooled and trapped atomic ions.
  • Detecting a single scattered photon to herald entanglement.

Main Results:

  • Successful entanglement of two distant atomic ions was achieved.
  • High entanglement rates were observed.
  • Fidelity was primarily limited by atomic motion.

Conclusions:

  • The experimental realization validates the proposed entanglement scheme.
  • The method offers a viable route for creating entangled states between remote ions.
  • Further improvements can be made by minimizing atomic motion effects.