24-27 November 2022
Karlsruhe Institute of Technology
Europe/Berlin timezone

Controlling atomic interactions and collective effects in thermal vapor cells

26 Nov 2022, 16:00
2h
Foyer (KIT Campus South)

Foyer

KIT Campus South

KIT Campus map: https://www.kit.edu/campusplan/ Building: 30.22 Room: Foyer im 1. und 2. OG Address: Institute of Technology, Engesserstraße 7, 76131 Karlsruhe Coordinates: 49.01244, 8.41062
Poster Physics Posters Poster session

Speaker

Annika Belz (5. Physikalisches Institut, Universität Stuttgart)

Description

Photonic quantum devices based on atomic vapors at room temperature are intrinsically reproducible, scalable and integrable. Besides quantum memories for single photons, one key device in the field of quantum information processing are on-demand single-photon sources. A promising candidate for their realization relies on the combination of four-wave mixing and the Rydberg blockade effect. This has been demonstrated in 2018 [1] and a second generation with improved repetition rate and brightness is currently in development.
Further miniaturization of this experimental set-up is possible by combining photonic structures and atomic vapors on a chip. Those integrated devices additionally lever efficient atom-light interactions below the diffraction limit. In contrast to free-space interactions, atoms aligned within a slot waveguide experience repulsive interactions enhanced by a factor of eight due to the Purcell effect. This leads to a corresponding blue shift, as the atoms are arranged in an essentially one-dimensional geometry, which vanishes above the saturation, providing a controllable nonlinearity at the few-photon level [2].

[1] Ripka et al., Science 362, 6413 (2018)
[2] Skljarow et al., Phys. Rev. Research 4, 023073 (2022)

Category Other

Primary author

Annika Belz (5. Physikalisches Institut, Universität Stuttgart)

Co-authors

Max Mäusezahl (5. Physikalisches Institut, Universität Stuttgart) Felix Moumtsilis (5. Physikalisches Institut, Universität Stuttgart) Artur Skljarow (5. Physikalisches Institut, Universität Stuttgart) Benyamin Shnirman (5. Physikalisches Institut, Universität Stuttgart) Xiaoyu Cheng (5. Physikalisches Institut, Universität Stuttgart) Hadiseh Alaeian (3Departments of Electrical & Computer Engineering and Physics & Astronomy, Purdue University, USA) Harald Kübler (5. Physikalisches Institut, Universität Stuttgart) Robert Löw (5. Physikalisches Institut, Universität Stuttgart) Tilman Pfau (5. Physikalisches Institut, Universität Stuttgart)

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