Method and apparatus for single-photon source and quantum...

Details Method and apparatus for single-photon source and quantum... Method and apparatus for single-photon source and quantum...

2006-03-28

2006-03-28

Boutsikaris, Leonidas (Department: 2872)

Optical: systems and elements

Optical computing without diffraction

C359S108000, C708S191000

Reexamination Certificate

active

07019875

ABSTRACT:
An optical switch and optical storage loop are used as the basis of a single-photon source and a quantum memory for photonic qubits. To operate as a single-photon source, the techniques include a source of a pair of photons, such as a parametric down-conversion crystal, which is known to emit photons in pairs. The detection of one member of the pair activates the switch, which re-routes the other member into the storage loop. The stored photon is then known to be circulating in the loop, and can be switched out of the loop at a later time chosen by the user, providing a single photon for potential use in a variety of quantum information processing applications. To operate as a quantum memory for photonic qubits, a single-photon in an arbitrary initial polarization state is coherently stored in the loop, and coherently switched out of the loop when needed.

REFERENCES:
patent: 2005/0025200 (2005-02-01), Santori et al.
patent: 2378319 (2005-02-01), None
Quantum Logic with Light, Glass & Mirrors, A. Shields, www.sciencemag.org, vol. 297, Sep. 13, 2002.
Nonlocality in Quantum Computing, Franson et al., Fortschr. Phys. 46(1998) 6-8, 697-705.
An Optical Approach to Quantum Computing, Franson et al., CP Williams (ED.): QCQC '98, LNCS 1509, pp. 383-390, 1999, © Springer-Verlag Berlin Heidelberg 1999.

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