Unconditional Quantum Teleportation
A. Furusawa,
J. L. Sørensen,
S.
L. Braunstein,
C. A. Fuchs,
H. J. Kimble,
*
E. S. Polzik
Quantum teleportation of optical coherent states was demonstrated
experimentally using squeezed-state entanglement. The quantum nature of
the achieved teleportation was verified by the experimentally determined fidelity Fexp = 0.58 ± 0.02, which describes the match between input and output states. A fidelity
greater than 0.5 is not possible for coherent states without the use of
entanglement. This is the first realization of unconditional quantum
teleportation where every state entering the device is actually
teleported.
A. 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. Sørensen and
E. S. Polzik are at the Institute of Physics and Astronomy, Aarhus
University, Aarhus 8000, Denmark. S. L. Braunstein is at the
School of Electrical Engineering and Computer Systems, University of
Wales, Bangor LL57 1UT, UK.
*
To whom correspondence should be addressed. E-mail:
hjkimble{at}cco.caltech.edu
