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SAMOP 2021 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 6: Quantum Gases and Matter Waves (joint session Q/A)

Q 6.2: Poster

Dienstag, 21. September 2021, 16:30–18:30, P

Compressibility of a two-dimensional homogeneous Bose gas in a box — •Leon Espert Miranda, Erik Busley, Kirankumar Umesh, Frank Vewinger, Martin Weitz, and Julian Schmitt — Institut für Angewandte Physik, Universität Bonn, Bonn, Germany

Homogeneous quantum gases enable studies of the collective behavior in quantum materials ranging from superfluids to neutron stars. A particular example for quantum matter are Bose-Einstein condensates (BEC). Here we realize an optical quantum gas in a box potential inside a nanostructured microcavity and observe BEC in the finite-size homogeneous 2D system. By exerting a force on the photon gas, we probe its compressibility and equation of state, demonstrating the physical significance of the infinitely compressible BEC in an ideal gas.

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