29 August 2006 Toward a quasi-deterministic single-photon source
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A source of single photons allows secure quantum key distribution, in addition, to being a critical resource for linear optics quantum computing. We describe our progress on deterministically creating single photons from spontaneous parametric downconversion, an extension of the Pittman, Jacobs and Franson scheme [Phys. Rev A, v66, 042303 (2002)]. Their idea was to conditionally prepare single photons by measuring one member of a spontaneously emitted photon pair and storing the remaining conditionally prepared photon until a predetermined time, when it would be "deterministically" released from storage. Our approach attempts to improve upon this by recycling the pump pulse in order to decrease the possibility of multiple-pair generation, while maintaining a high probability of producing a single pair. Many of the challenges we discuss are central to other quantum information technologies, including the need for low-loss optical storage, switching and detection, and fast feed-forward control.
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N. A. Peters, N. A. Peters, K. J. Arnold, K. J. Arnold, A. P. VanDevender, A. P. VanDevender, E. R. Jeffrey, E. R. Jeffrey, R. Rangarajan, R. Rangarajan, O. Hosten, O. Hosten, J. T. Barreiro, J. T. Barreiro, J. B. Altepeter, J. B. Altepeter, P. G. Kwiat, P. G. Kwiat, } "Toward a quasi-deterministic single-photon source", Proc. SPIE 6305, Quantum Communications and Quantum Imaging IV, 630507 (29 August 2006); doi: 10.1117/12.684702; https://doi.org/10.1117/12.684702

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