Experimental realization of a photonic Bell-state analyzer

Journal Article · Fri Jul 15 00:00:00 EDT 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.72.010302· OSTI ID:20718280

Walther, Philip ^[1]; Zeilinger, Anton ^[1]

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1. Institut fuer Experimentalphysik, Universitaet Wien, Boltzmanngasse 5, A-1090 Wien (Austria)

Efficient teleportation is a crucial step for quantum computation and quantum networking. In the case of qubits, four different entangled Bell states have to be distinguished. We have realized a probabilistic, but in principle deterministic, Bell-state analyzer for two photonic quantum bits by the use of a nondestructive controlled-NOT gate based on entirely linear optical elements. This gate was capable of distinguishing between all of the Bell states with higher than 75% fidelity without any noise substraction due to utilizing quantum interference effects.

• OSTI ID: 20718280
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 72; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BELL THEOREM
INTERFERENCE
NOISE
OPTICS
PROBABILISTIC ESTIMATION
QUANTUM COMPUTERS
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
QUANTUM TELEPORTATION
QUBITS