Details
| Original language | English |
|---|---|
| Article number | 013619 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 88 |
| Issue number | 1 |
| Publication status | Published - 12 Jul 2013 |
Abstract
Roton excitations constitute a key feature of dipolar gases, connecting these gases with superfluid helium. We show that the density dependence of the roton minimum results in a spatial roton confinement, particularly relevant in pancake dipolar condensates with large aspect ratios. We show that roton confinement plays a crucial role in the dynamics after roton instability, and that arresting the instability may create a trapped roton gas revealed by confined density modulations. We discuss the local susceptibility against density perturbations, which we illustrate for the case of vortices. Roton confinement is expected to play a key role in experiments.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 88, No. 1, 013619, 12.07.2013.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Roton confinement in trapped dipolar Bose-Einstein condensates
AU - Jona-Lasinio, Mattia
AU - Łakomy, Kazimierz
AU - Santos, Luis
PY - 2013/7/12
Y1 - 2013/7/12
N2 - Roton excitations constitute a key feature of dipolar gases, connecting these gases with superfluid helium. We show that the density dependence of the roton minimum results in a spatial roton confinement, particularly relevant in pancake dipolar condensates with large aspect ratios. We show that roton confinement plays a crucial role in the dynamics after roton instability, and that arresting the instability may create a trapped roton gas revealed by confined density modulations. We discuss the local susceptibility against density perturbations, which we illustrate for the case of vortices. Roton confinement is expected to play a key role in experiments.
AB - Roton excitations constitute a key feature of dipolar gases, connecting these gases with superfluid helium. We show that the density dependence of the roton minimum results in a spatial roton confinement, particularly relevant in pancake dipolar condensates with large aspect ratios. We show that roton confinement plays a crucial role in the dynamics after roton instability, and that arresting the instability may create a trapped roton gas revealed by confined density modulations. We discuss the local susceptibility against density perturbations, which we illustrate for the case of vortices. Roton confinement is expected to play a key role in experiments.
UR - http://www.scopus.com/inward/record.url?scp=84880645326&partnerID=8YFLogxK
UR - https://journals.aps.org/pra/abstract/10.1103/PhysRevA.88.049905
U2 - 10.1103/PhysRevA.88.013619
DO - 10.1103/PhysRevA.88.013619
M3 - Article
AN - SCOPUS:84880645326
VL - 88
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 1
M1 - 013619
ER -