Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 4: Quantum gases (Fermions) I

Q 4.5: Talk

Monday, March 9, 2020, 12:00–12:15, e214

Slow quench in dilute attractively interacting Fermi gases: Emergence of preformed pairs — •Johannes Kombe, Jean-Sébastien Bernier, Michael Köhl, and Corinna Kollath — Physikalisches Institut, University of Bonn, Nussallee 12, 53115 Bonn, Germany

We investigate the non-equilibrium behaviour of dilute attractively interacting Fermi gases subject to slow ramps of their internal interaction strength, identifying three different dynamical regimes as a function of ramp duration. We demonstrate that, via slow quenches, one can dynamically tune the coherence between pairs, and thus control the magnitude of the superconducting order parameter. In fact, we show that one can even engineer a non-equilibrium state made of preformed pairs.