Supersolidity in Two-Dimensional Trapped Dipolar Droplet Arrays.

  title={Supersolidity in Two-Dimensional Trapped Dipolar Droplet Arrays.},
  author={Jens Hertkorn and J.-N. Schmidt and Mei Guo and F. B{\"o}ttcher and K. S. H. Ng and S. D. Graham and Peter Uerlings and Hans Peter B{\"u}chler and Tim Langen and Martin W. Zwierlein and Tilman Pfau},
  journal={Physical review letters},
  volume={127 15},
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… 

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