3 research outputs found
Experimental Quantum Teleportation with a 3-Bell-state Analyzer
We present a Bell-state analyzer for time-bin qubits allowing the detection
of three out of four Bell-states with linear optics, two detectors and no
auxiliary photons. The theoretical success rate of this scheme is 50%. A
teleportation experiment was performed to demonstrate its functionality. We
also present a teleportation experiment with a Fidelity larger than the cloning
limit of F=5/6.Comment: 11 pages, 14 figure
Quantum Teleportation with a 3-Bell-state Analyzer
We present a novel Bell-state analyzer for time-bin qubits allowing the
detection of three out of four Bell-states with linear optics, only two
detectors and no auxiliary photons. The theoretical success rate of this scheme
is 50%. A teleportation experiment was performed to demonstrate its
functionality. We also present a teleportation experiment with a fidelity
larger than the cloning limit.Comment: 4 pages, 6 figure
Controlled Quantum Secret Sharing
We present a new protocol in which a secret multiqubit quantum state
is shared by players and controllers, where
is the encoding state of a quantum secret sharing scheme. The players may be
considered as field agents responsible for carrying out a task, using the
secret information encrypted in , while the controllers are
superiors who decide if and when the task should be carried out and who to do
it. Our protocol only requires ancillary Bell states and Bell-basis
measurements.Comment: 6 pages, 0 figure, RevTeX4; published version with minor change