Недавно группа ученых из Института Физических Исследований Национальной Академии Наук Армении, совместно с коллегами из Института Физических Исследований Российской Академии Наук в Н.Новгороде и Центра Физики Сильных Полей в Ереванском Государственном Университете Армении, опубликовали статью в журнале Laser Physics под названием "Heralded generation of single photons entangled in multiple temporal modes with controllable waveforms".

Статья доступна здесь.

Авторы

А. Гогян1, Н. Сисакян1, Р. Ахмеджанов2 и Ю. Малакян1,3

1 Institute for Physical Research, Armenian National Academy of Sciences, Ashtarak-2, 0203, Armenia
2 Institute of Applied Physics, Russian Academy of Sciences, 46 Ul'yanova str., Nizhni Novgorod, 603950, Russia
3 Centre of Strong Field Physics, Yerevan State University, 1 A. Manukian St., Yerevan 0025, Armenia

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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This project has received funding from the European Union's Seventh Framework Programme for research, technological development and demonstration under grant agreement no 609534.