Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 51: Poster: Quantum Optics and Photonics IV
Q 51.7: Poster
Mittwoch, 7. März 2018, 16:15–18:15, Redoutensaal
An experimental setup for the study of universality far from equilibrium with degenerate 39K — •Maurus Hans, Celia Viermann, Alexander Impertro, Marius Sparn, Helmut Strobel, and Markus K. Oberthaler — Kirchhoff-Institut für Physik, Universität Heidelberg, Deutschland
In thermal equilibrium different physical systems close to a phase transition are described by the same set of critical exponents given by the corresponding universality class. This concept can be extended to non-equilibrium dynamics where theoretical studies show that universal scaling in time and space appear also away from an equilibrium critical point [1]. In degenerate quantum gases, universality can be reached by a quench close to such a critical point [2], but also by just abruptly changing the scattering length such that the system is driven out of equilibrium [3,4]. For this purpose, a 39K Bose-Einstein condensate is an especially promising experimental system since it exhibits a broad magnetic Feshbach resonance for interaction tuning. Here, we present the status of the current experimental setup and schemes for the detection of universal time dynamics.
[1] B. Nowak et al., in Strongly Interacting Quantum Systems out of Equilibrium, ed. T. Giamarchi et al., Lecture Notes of the Les Houches Summer School Vol. 99, 2016 [2] E. Nicklas et al., Phys. Rev. Lett. 115, 245301 (2015) [3] J. Berges et. al., Phys. Rev. Lett. 114, 061601 (2015) [4] B. Nowak et al., Phys. Rev. B 84, 020506(R) (2011)