Quantum Teleportation with a Three-Bell-State Analyzer
J. A. W. van Houwelingen, Nicolas Brunner, A. Beveratos, Hugo Zbinden, Nicolas Gisin · Physical Review Letters · 2006
We present a novel Bell-state analyzer (BSA) 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%. Our new BSA demonstrates the power of generalized quantum measurements, known as positive operator valued measurements. A teleportation experiment was performed to demonstrate its functionality. We also present a teleportation experiment with a fidelity larger than the cloning limit.