Journal
PHYSICAL REVIEW LETTERS
Volume 107, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.080403
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Funding
- Ministry of Science Education & Sport of Croatia [082-0982562-3160]
- U.S. National Science Foundation
- Smithsonian Astrophysical Observatory
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For a reliable implementation of quantum teleportation, a near-deterministic (close to 100%) discrimination of all four Bell states of entangled qubits is required. One can carry it out with linear optical elements only if conditional dynamics are allowed. Here we present a setup in which we repeatedly disentangle and reentangle photons in three of four states, so as to separate photons in one of them, conditioned on keeping the other two at bay. The efficiency of a realistic implementation of our setup with current technology is over 90% for an ideal source of photons on demand.
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