Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 041039 |
| Fachzeitschrift | Physical Review X |
| Jahrgang | 6 |
| Ausgabenummer | 4 |
| Publikationsstatus | Veröffentlicht - 22 Nov. 2016 |
Abstract
In a joint experimental, theoretical effort, we report on the formation of a macrodroplet state in an ultracold bosonic gas of erbium atoms with strong dipolar interactions. By precise tuning of the s-wave scattering length below the so-called dipolar length, we observe a smooth crossover of the ground state from a dilute Bose-Einstein condensate to a dense macrodroplet state of more than 2 × 104 atoms. Based on the study of collective excitations, loss features, we prove that quantum fluctuations stabilize the ultracold gas far beyond the instability threshold imposed by mean-field interactions. Finally, we perform expansion measurements, showing that although self-bound solutions are prevented by losses, the interplay between quantum stabilization, losses results in a minimal time-of-flight expansion velocity at a finite scattering length.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Allgemeine Physik und Astronomie
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in: Physical Review X, Jahrgang 6, Nr. 4, 041039, 22.11.2016.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Quantum-Fluctuation-driven crossover from a dilute bose-einstein condensate to a macrodroplet in a dipolar quantum fluid
AU - Chomaz, L.
AU - Baier, Simon
AU - Petter, D.
AU - Mark, M. J.
AU - Wächtler, Falk
AU - Santos, Luis
AU - Ferlaino, F.
PY - 2016/11/22
Y1 - 2016/11/22
N2 - In a joint experimental, theoretical effort, we report on the formation of a macrodroplet state in an ultracold bosonic gas of erbium atoms with strong dipolar interactions. By precise tuning of the s-wave scattering length below the so-called dipolar length, we observe a smooth crossover of the ground state from a dilute Bose-Einstein condensate to a dense macrodroplet state of more than 2 × 104 atoms. Based on the study of collective excitations, loss features, we prove that quantum fluctuations stabilize the ultracold gas far beyond the instability threshold imposed by mean-field interactions. Finally, we perform expansion measurements, showing that although self-bound solutions are prevented by losses, the interplay between quantum stabilization, losses results in a minimal time-of-flight expansion velocity at a finite scattering length.
AB - In a joint experimental, theoretical effort, we report on the formation of a macrodroplet state in an ultracold bosonic gas of erbium atoms with strong dipolar interactions. By precise tuning of the s-wave scattering length below the so-called dipolar length, we observe a smooth crossover of the ground state from a dilute Bose-Einstein condensate to a dense macrodroplet state of more than 2 × 104 atoms. Based on the study of collective excitations, loss features, we prove that quantum fluctuations stabilize the ultracold gas far beyond the instability threshold imposed by mean-field interactions. Finally, we perform expansion measurements, showing that although self-bound solutions are prevented by losses, the interplay between quantum stabilization, losses results in a minimal time-of-flight expansion velocity at a finite scattering length.
UR - http://www.scopus.com/inward/record.url?scp=85008240001&partnerID=8YFLogxK
U2 - 10.1103/PhysRevX.6.041039
DO - 10.1103/PhysRevX.6.041039
M3 - Article
AN - SCOPUS:85008240001
VL - 6
JO - Physical Review X
JF - Physical Review X
SN - 2160-3308
IS - 4
M1 - 041039
ER -