Erlangen 2018 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 4: Ultracold Plasmas and Rydberg Systems I (joint session Q/A)

A 4.4: Vortrag

Montag, 5. März 2018, 11:30–11:45, K 2.013

On-demand single-photon source based on thermal rubidium — •Fabian Ripka, Florian Christaller, Hao Zhang, Harald Kübler, Robert Löw, and Tilman Pfau — 5. Physikalisches Institut and IQST, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart

Photonic quantum devices based on atomic vapors at room temperature combine the advantages of atomic vapors being intrinsically reproducable as well as semiconductor-based concepts being scalable and integrable. One key device in the field of quantum information are on-demand single-photon sources. A promising candidate for realization relies on the combination of two effects in atomic ensembles, namely four-wave mixing (FWM) and the Rydberg blockade effect, comparable to similar realizations using cold atoms [1].

Coherent dynamics to Rydberg states [2] and sufficient Rydberg interaction strengths [3] have already been demonstrated in thermal vapors. Additionally, time-resolved probing of collective Rydberg excitation has been performed [4], revealing a lifetime long enough for effective Rydberg-Rydberg interactions.

In the current state of the experiment, the Rydberg blockade sphere is larger than the excitation volume. We report on effects on the light statistics of the emitted photons we observed in the experiment.

[1] Y. O. Dudin et al., Science 336, 6083 (2012)

[2] Huber et al., PRL 107, 243001 (2011)

[3] Baluktsian et al., PRL 110, 123001 (2013)

[4] Ripka et al., Phys. Rev. A, 053429 (2016)