Supersolidity in Two-Dimensional Trapped Dipolar Droplet Arrays
Jens Hertkorn, Jan-Niklas Schmidt, Mingyang Guo, Fabian Böttcher, K. S. H. Ng, Sean Graham, Paul Uerlings, Hans Peter Büchler, Tim Langen, Martin W. Zwierlein, Tilman Pfau
Abstract
We theoretically investigate the ground states and the spectrum of elementary excitations across the superfluid to droplet crystallization transition of an oblate dipolar Bose-Einstein condensate. We systematically identify regimes where spontaneous rotational symmetry breaking leads to the emergence of a supersolid phase with characteristic collective excitations, such as the Higgs amplitude mode. Furthermore, we study the dynamics across the transition and show how these supersolids can be realized with standard protocols in state-of-the-art experiments.
Topics & Concepts
SupersolidPhysicsSuperfluidityAmplitudePhase transitionDipoleBose–Einstein condensateHiggs bosonGround stateCondensed matter physicsPhase (matter)Symmetry breakingQuantum mechanicsPhase diagramCold Atom Physics and Bose-Einstein CondensatesQuantum, superfluid, helium dynamicsAtomic and Subatomic Physics Research