Time-bin entangled qubits for quantum communication created by femtosecond pulses

Journal Article · Sun Dec 01 00:00:00 EST 2002 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.66.062308· OSTI ID:20632416

Marcikic, I; Riedmatten, H de; Scarani, V; Zbinden, H; Gisin, N ^[1]; Tittel, W ^[1]

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1. Group of Applied Physics-Optique, University of Geneva, CH-1211, Geneva 4 (Switzerland)

We create pairs of nondegenerate time-bin entangled photons at telecom wavelengths with ultrashort pump pulses. Entanglement is shown by performing Bell kind tests of the Franson type with visibilities of up to 91%. As time-bin entanglement can easily be protected from decoherence as encountered in optical fibers, this experiment opens the road for complex quantum communication protocols over long distances. We also investigate the creation of more than one photon pair in a laser pulse and present a simple tool to quantify the probability of such events to happen.

• OSTI ID: 20632416
• Journal Information: Physical Review. A, Vol. 66, Issue 6; Other Information: DOI: 10.1103/PhysRevA.66.062308; (c) 2002 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BELL THEOREM
DATA TRANSMISSION
DISTANCE
LASER RADIATION
MULTI-PHOTON PROCESSES
OPTICAL FIBERS
PHOTONS
PROBABILITY
PULSES
WAVELENGTHS