Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session E06: Cold and Ultracold Multielectron Atoms
2:00 PM–3:48 PM,
Tuesday, June 1, 2021
Chair: Dan Stamper-Kurn, UC Berkeley
Abstract: E06.00005 : Stability of a purely dipolar gas in a power-law potential*
2:48 PM–3:00 PM
Live
Presenter:
Péter Juhász
(Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom)
Authors:
Péter Juhász
(Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom)
Milan Krstajic
(Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom ; Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE)
David Strachan
(Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom)
Edward Gandar
(Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom)
Robert Smith
(Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom)
For small aspect ratios, we confirm the instability is seeded by high density at the centre of the trap. However, for larger aspect ratios this transforms into a roton-like instability, which is seeded by finite-k roton-like density oscillations. For high-n (box-like) potentials, we find that however large the aspect ratio is, a confined gas is always less stable than a completely uniform one as instability is seeded by the hard wall. Interestingly, we observe that a softer potential (n~7) actually produces a more homogeneous 2D-density than a simple box-potential.
*This work was supported by EPSRC Grant No. EP/P009565/1, the John Fell Oxford University Press (OUP) Research Fund and the Royal Society. P. J. acknowledges funding from NTP Grant No. NTP-NFTÖ-20-C-0052. M. K. acknowledges funding from Trinity College, University of Cambridge.
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