Vortex Lattice in Rotating Prolate <sup>4</sup>He Droplets
ORAL
Abstract
So far, lattices of quantum vortices have been observed in axially symmetric, rotating superfluid 4He or rotating Bose-Einstein condensates (BECs). Vortex configurations in rotating superfluids lacking axial symmetry have been discussed theoretically, but experimental observation of such systems proves to be challenging. Here, we present a study of vortices in microscopic free, prolate superfluid 4He droplets rotating around their short axis. The vortices were doped with Xe atoms and studied via coherent x-ray scattering at the LCLS free-electron laser. It was found that the vortices form a distorted lattice within the droplet. We compare the shapes of classical droplets executing rigid body rotation to rotating prolate superfluid droplets, the angular momentum of which has contributions from quantum vortices and potential flow.
*This work was funded under the NSF grant DMR 1701077.
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Presenters
Sean O'Connell
University of Southern California
Chemistry, University of Southern California
Authors
Sean O'Connell
University of Southern California
Chemistry, University of Southern California
Deepak Verma
University of Southern California
Chemistry, University of Southern California
Rico Mayro P Tanyag
Chemistry, University of Southern California
Weiwu Pang
Electrical Engineering, University of Southern California
Camila Bacellar
Chemical Sciences Division, Lawrence Berkeley National Laboratory
Catherine A Saladrigas
University of California, Berkeley
Chemical Sciences Division, Lawrence Berkeley National Laboratory
Johannes Mahl
Chemical Sciences Division, Lawrence Berkeley National Laboratory
Benjamin W Toulson
LBNL
Chemical Sciences Division, Lawrence Berkeley National Laboratory
Yoshiaki Kumagai
Argonne National Labratory
Peter Walter
SLAC
LCLS, SLAC National Accelerator Laboratory
Christoph Bostedt
Paul Scherrer Institut
Argonne National Labratory
Oliver Gessner
LBNL
Chemical Sciences Division, Lawrence Berkeley National Laboratory
