SAMOP 2023 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 42: Poster III

Q 42.30: Poster

Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof

Towards the observation of collective radiance phenomena in a one-dimensional array of waveguide-coupled atoms with sub-λ/2 spacing — •Lucas Pache, Martin Cordier, Max Schemmer, Philipp Schneeweiss, Jürgen Volz, and Arno Rauschenbeutel — Department of Physics, Humboldt-Universität zu Berlin, Germany

Recently, it has been shown theoretically that the infidelity of photon storage and retrieval in quantum memories scales exponentially better with the number of emitters if one harnesses the collective response of closely spaced atomic arrays [1,2]. This improved scaling relies on the effect of selective radiance, i.e., destructive interference of scattering into undesired modes. This occurs when the mean distance in a periodic array of emitters is smaller than half of the atomic resonant wavelength (d < λ /2). In order to realize this situation, we trap and optically interface laser-cooled cesium atoms using a two-color nanofiber-based dipole trap which is composed of a blue-detuned partial standing wave and a red-detuned running wave light field. The resulting trapping potential consists of one-dimensional trapping sites which are spaced by d ≃ 0.37 λ. We characterize this trapping configuration by measuring the trap frequencies as well as the lifetime and the total number of the trapped atoms.

[1] A. Asenjo-Garcia et al. PRX 7, 031024 (2017)

[2] M. Manzoni et al. NJP 20, 083048 (201