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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Unconditional quantum teleportation

Furusawa1, Sorensen, Braunstein

  • 1A. Furusawa, C. A. Fuchs, and H. J. Kimble are in the Norman Bridge Laboratory of Physics, California Institute of Technology, Pasadena, CA 91125, USA. J. L. Sorensen and E. S. Polzik are at the Institute of Physics and Astronomy, Aarhus University, A.

Science (New York, N.Y.)
|October 23, 1998
PubMed
Summary
This summary is machine-generated.

This study demonstrates unconditional quantum teleportation of optical coherent states using squeezed-state entanglement. Experimental results confirm the quantum nature of the process with a fidelity exceeding the classical limit.

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Area of Science:

  • Quantum physics
  • Quantum optics
  • Quantum information science

Background:

  • Quantum teleportation enables the transfer of quantum states.
  • Entanglement is crucial for achieving high-fidelity quantum teleportation.
  • Previous teleportation protocols often lacked unconditional state transfer.

Purpose of the Study:

  • To experimentally demonstrate unconditional quantum teleportation of optical coherent states.
  • To verify the quantum nature of the teleportation process.
  • To utilize squeezed-state entanglement for enhanced teleportation fidelity.

Main Methods:

  • Experimental implementation of quantum teleportation.
  • Utilizing squeezed-state entanglement as a resource.
  • Measuring the fidelity between input and output quantum states.

Main Results:

  • Successful experimental demonstration of quantum teleportation for optical coherent states.
  • Achieved experimental fidelity (Fexp) of 0.58 +/- 0.02.
  • Demonstrated unconditional teleportation, with every input state being teleported.

Conclusions:

  • The experiment confirms the quantum advantage in teleportation, surpassing the classical limit of 0.5 fidelity.
  • Squeezed-state entanglement is an effective resource for high-fidelity quantum teleportation.
  • This work represents the first realization of unconditional quantum teleportation.