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arXiv · 1411.4269

Heralded generation of single photons entangled in multiple temporal modes with controllable waveforms

Anahit Gogyan·Narek Sisakyan·Rinat Akhmedzhanov·Yuri Malakyan
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Abstract

Time-bin entangled single-photons are highly demanded for long distance quantum communication. We propose a heralded source of tunable narrowband single photons entangled in well-separated multiple temporal modes (time bins) with controllable amplitudes. The detection of a single Stokes photon generated in a cold atomic ensemble via Raman scattering of a weak write pulse heralds the preparation of one spin excitation stored within the atomic medium. A train of read laser pulses deterministically converts the atomic excitation into a single anti-Stokes photon delocalized in multi-time-bins. The waveforms of bins are well-controlled by the read pulse parameters. A scheme to measure the phase coherence across all time bins is suggested.

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Anahit Gogyan, Narek Sisakyan, Rinat Akhmedzhanov, Yuri Malakyan. 2014-11-16. Heralded generation of single photons entangled in multiple temporal modes with controllable waveforms. https://doi.org/10.1088/1054-660x%2F24%2F11%2F115204

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