Details
| Original language | English |
|---|---|
| Article number | 043618 |
| Journal | Physical Review A |
| Volume | 94 |
| Issue number | 4 |
| Publication status | Published - 10 Oct 2016 |
Abstract
Recent experiments have revealed the formation of stable droplets in dipolar Bose-Einstein condensates. This surprising result has been explained by the stabilization given by quantum fluctuations. We study in detail the properties of a Bose-Einstein condensate in the presence of quantum stabilization. The ground-state phase diagram presents three main regimes: mean-field regime, in which the quantum correction is perturbative; droplet regime, in which quantum stabilization is crucial; and a multistable regime. In the absence of a multistable region, the condensate undergoes a crossover from the mean-field to the droplet solution marked by a characteristic growth of the peak density that may be employed to clearly distinguish quantum stabilization from other stabilization mechanisms. Interestingly, quantum stabilization allows for three-dimensionally self-bound condensates. We characterized these self-bound solutions, and discuss their realization in experiments. We conclude with a discussion of the lowest-lying excitations both for trapped condensates, and for self-bound solutions.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Physical Review A, Vol. 94, No. 4, 043618, 10.10.2016.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ground-state properties and elementary excitations of quantum droplets in dipolar Bose-Einstein condensates
AU - Wächtler, Falk
AU - Santos, Luis
PY - 2016/10/10
Y1 - 2016/10/10
N2 - Recent experiments have revealed the formation of stable droplets in dipolar Bose-Einstein condensates. This surprising result has been explained by the stabilization given by quantum fluctuations. We study in detail the properties of a Bose-Einstein condensate in the presence of quantum stabilization. The ground-state phase diagram presents three main regimes: mean-field regime, in which the quantum correction is perturbative; droplet regime, in which quantum stabilization is crucial; and a multistable regime. In the absence of a multistable region, the condensate undergoes a crossover from the mean-field to the droplet solution marked by a characteristic growth of the peak density that may be employed to clearly distinguish quantum stabilization from other stabilization mechanisms. Interestingly, quantum stabilization allows for three-dimensionally self-bound condensates. We characterized these self-bound solutions, and discuss their realization in experiments. We conclude with a discussion of the lowest-lying excitations both for trapped condensates, and for self-bound solutions.
AB - Recent experiments have revealed the formation of stable droplets in dipolar Bose-Einstein condensates. This surprising result has been explained by the stabilization given by quantum fluctuations. We study in detail the properties of a Bose-Einstein condensate in the presence of quantum stabilization. The ground-state phase diagram presents three main regimes: mean-field regime, in which the quantum correction is perturbative; droplet regime, in which quantum stabilization is crucial; and a multistable regime. In the absence of a multistable region, the condensate undergoes a crossover from the mean-field to the droplet solution marked by a characteristic growth of the peak density that may be employed to clearly distinguish quantum stabilization from other stabilization mechanisms. Interestingly, quantum stabilization allows for three-dimensionally self-bound condensates. We characterized these self-bound solutions, and discuss their realization in experiments. We conclude with a discussion of the lowest-lying excitations both for trapped condensates, and for self-bound solutions.
UR - http://www.scopus.com/inward/record.url?scp=84992150877&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.94.043618
DO - 10.1103/PhysRevA.94.043618
M3 - Article
AN - SCOPUS:84992150877
VL - 94
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 4
M1 - 043618
ER -