Rostock 2019 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 51: Quantum Information (Quantum Repeater) II
Q 51.7: Talk
Thursday, March 14, 2019, 15:30–15:45, S HS 002 Chemie
Variable delay based on electromagnetically induced transparency in cesium at room temperature for photon storage — Esteban Gomez Lopez1, •Tim Kroh1, Chris Müller1, Janik Wolters2, and Oliver Benson1 — 1Humboldt-Universtät zu Berlin, Germany — 2Universität Basel, Switzerland
With the fast development of quantum information and quantum networks, the needs of reliable memories are also on the rise. These memories must be able to coherently store quantum states between two or more nodes in order to build a scalable quantum network [1].
Here, we present an experiment on controlled delaying of photons from a cavity-enhanced parametric downconversion source [2] for storage by traveling through a cesium vapor cell at room temperature. This delay is created by electromagnetically induced transparency (EIT) addressing three hyperfine states of the D1 absorption line of cesium [3], which can be interfaced with the telecommunication bands [4]. The obtained EIT windows reach a FWHM of 250 MHz, making them a good option for storing single photons produced by other quantum light sources, in particular quantum dots with comparable Fourier-limited linewidth emission [5].
[1] O. A. Collins et al., Phys. Rev. Lett. 98, 060502 (2007).
[2] A. Ahlrichs and O. Benson, Appl. Phys. Lett. 108, 021111 (2016).
[3] D. Höckel and O. Benson, Phys. Rev. Lett. 105, 153605 (2010).
[4] T. Kroh et al., Quantum Sci. Technol. 2, 034007 (2017).
[5] J. Wolters et al., Phys. Rev. Lett. 119, 060502 (2017).