Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session L59: Supersolid Formation in Quantum Gases
11:15 AM–1:39 PM,
Wednesday, March 7, 2018
LACC
Room: Petree Hall D
Sponsoring
Unit:
DAMOP
Chair: Dominik Schneble, Stony Brook University
Abstract ID: BAPS.2018.MAR.L59.4
Abstract: L59.00004 : Dipolar quantum droplets and striped states
1:03 PM–1:39 PM
Presenter:
Matthias Wenzel
(5. Physikalisches Institut and IQST, Universität Stuttgart)
Authors:
Matthias Wenzel
(5. Physikalisches Institut and IQST, Universität Stuttgart)
Fabian Böttcher
(5. Physikalisches Institut and IQST, Universität Stuttgart)
Tim Langen
(5. Physikalisches Institut and IQST, Universität Stuttgart)
Igor Ferrier-Barbut
(5. Physikalisches Institut and IQST, Universität Stuttgart)
Tilman Pfau
(5. Physikalisches Institut and IQST, Universität Stuttgart)
First, we have observed in this system an unanticipated phase-transition between a gas and a liquid, characterized by the formation of self-bound droplets [1-3]. It forms in a parameter region where the existing theory, based on the mean-field approximation, predicted a mechanical collapse of the gas. We showed that the repulsive beyond meanfield corrections prevent the collapse and are responsible for the stabilization of the liquid [2]. These corrections arise from quantum fluctuations (zero-point motion) of the collective modes (Bogolyubov sound modes) in the quantum fluid.
In recent work we show that in constrained geometries, the ground-state is self-organized. Studying these geometries experimentally, we indeed observe stable self-organized ‘striped’ states, likely in metastable excited states [4]. Although we do not observe phase coherence in matter wave interference experiments, we point out a way to establish a common phase of multi-droplet states.
[1] H. Kadau, M. Schmitt, M. Wenzel, C. Wink, T. Maier, I. Ferrier-Barbut, and T. Pfau, Nature 530, 194 (2016)
[2] I. Ferrier-Barbut, H. Kadau, M. Schmitt, M. Wenzel, and T. Pfau, Phys. Rev. Lett. 116, 215301 (2016)
[3] M. Schmitt, M. Wenzel, F. Böttcher, I. Ferrier-Barbut and T. Pfau, Nature 539, 259 (2016)
[4] M. Wenzel, F. Böttcher, T. Langen, I. Ferrier-Barbut and T. Pfau, arXiv: 1706.09388
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAR.L59.4
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