DPG Phi
Verhandlungen
Verhandlungen
DPG

Hannover 2020 – scientific programme

The DPG Spring Meeting in Hannover had to be cancelled! Read more ...

Parts | Days | Selection | Search | Updates | Downloads | Help

A: Fachverband Atomphysik

A 28: Poster Session - Atomic Physics IV

A 28.22: Poster

Thursday, March 12, 2020, 16:00–18:00, Empore Lichthof

A trapped dipolar supersolid with atomic Dysprosium — •Kevin Ng1, Mingyang Guo1, Fabian Böttcher1, Jens Hertkorn1, Jan-Niklas Schmidt1, Hans Peter Büchler2, Tim Langen1, and Tilman Pfau115. Physikalisches Institut and Center for Integrated Quantum Science and Technology IQST, Universität Stuttgart — 2Institute for Theoretical Physics III and Center for Integrated Quantum Science and Technology IQST, Universität Stuttgart

A supersolid is a counter-intuitive state of matter that combines the frictionless flow of a superfluid with the crystal-like periodic density modulation of a solid. Although first predicted to exist over 50 years ago, recent efforts to realize such a state have not exhibited propagating phonon modes. With a self-organized array of dipolar quantum droplets, we demonstrate the first true realization of a supersolid state, where global gauge symmetry and translational symmetry are simultaneously broken.

In our system, a periodic density modulation arises from intrinsic interactions between atoms. This, and in addition to global phase coherence, we observe the Goldstone mode associated with two broken translational symmetries. This low-energy mode, existing only as a consequence of superfluid stiffness, features an out-of-phase oscillation of the crystal array and the superfluid density while keeping the center-of-mass constant. At the phase transition between BEC and supersolid phases, we identify the low-energy Goldstone and Higgs amplitude modes as emerging from the softening roton modes of the dipolar BEC.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2020 > Hannover