Work

Two-dimensional electronic spectroscopy of an ultracold gas

Year: 2022

Type: article

Abstract: Femtosecond coherent multidimensional spectroscopy is demonstrated for an ultracold gas. A setup for phase modulation spectroscopy is used to probe the 3 2 S 1/2 –2 2 P 1/2,3/2 transition in an 800 μ K-cold sample of 7 Li atoms confined in a magneto-optical trap. The observation of a double quantum coherence response, a signature of interparticle interactions, paves the way for detailed investigations of few- and many-body effects in ultracold gases using this technique. The experiment combines a frequency resolution of 3 GHz with a potential time resolution of 200 fs, which allows for high-resolution studies of ultracold atoms and molecules both in the frequency and in the time domain.

Source: Optics Letters

DOI: 10.1364/ol.477301

Authors: Friedemann Landmesser, Tobias Sixt, Katrin Dulitz, Lukas Bruder, Frank Stienkemeier

Institutions: University of Freiburg, Universität Innsbruck

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Fonds der Chemischen Industrie, Deutsche Forschungsgemeinschaft, H2020 European Research Council

Awards: G1669789616, Coherent multidimensional spectroscopy of controlled isolated systems