Details
| Original language | English |
|---|---|
| Article number | 023112 |
| Journal | Physical Review Research |
| Volume | 3 |
| Issue number | 2 |
| Publication status | Published - 10 May 2021 |
Abstract
The collective modes of a quantum liquid shape and impact its properties profoundly, including its emergent phenomena such as superfluidity. Here we present how a two-dimensional Bose gas responds to a moving lattice potential. In particular, we discuss how the induced heating rate depends on the interaction strength and the temperature. This study is motivated by the recent measurements of Sobirey [arXiv:2005.07607], for which we provide a satisfying understanding. Going beyond the existing measurements, we demonstrate that this probing method allows us to identify two sound modes in quantum liquids. We show that the two sound modes undergo hybridization as a function of interaction strength, which we propose to detect experimentally. This gives insight into the two regimes of Bose gases, defined via the hierarchy of sound modes.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Physical Review Research, Vol. 3, No. 2, 023112, 10.05.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Collective modes and superfluidity of a two-dimensional ultracold Bose gas
AU - Singh, Vijay Pal
AU - Mathey, Ludwig
PY - 2021/5/10
Y1 - 2021/5/10
N2 - The collective modes of a quantum liquid shape and impact its properties profoundly, including its emergent phenomena such as superfluidity. Here we present how a two-dimensional Bose gas responds to a moving lattice potential. In particular, we discuss how the induced heating rate depends on the interaction strength and the temperature. This study is motivated by the recent measurements of Sobirey [arXiv:2005.07607], for which we provide a satisfying understanding. Going beyond the existing measurements, we demonstrate that this probing method allows us to identify two sound modes in quantum liquids. We show that the two sound modes undergo hybridization as a function of interaction strength, which we propose to detect experimentally. This gives insight into the two regimes of Bose gases, defined via the hierarchy of sound modes.
AB - The collective modes of a quantum liquid shape and impact its properties profoundly, including its emergent phenomena such as superfluidity. Here we present how a two-dimensional Bose gas responds to a moving lattice potential. In particular, we discuss how the induced heating rate depends on the interaction strength and the temperature. This study is motivated by the recent measurements of Sobirey [arXiv:2005.07607], for which we provide a satisfying understanding. Going beyond the existing measurements, we demonstrate that this probing method allows us to identify two sound modes in quantum liquids. We show that the two sound modes undergo hybridization as a function of interaction strength, which we propose to detect experimentally. This gives insight into the two regimes of Bose gases, defined via the hierarchy of sound modes.
UR - http://www.scopus.com/inward/record.url?scp=85113843798&partnerID=8YFLogxK
U2 - 10.1103/PhysRevResearch.3.023112
DO - 10.1103/PhysRevResearch.3.023112
M3 - Article
AN - SCOPUS:85113843798
VL - 3
JO - Physical Review Research
JF - Physical Review Research
SN - 2643-1564
IS - 2
M1 - 023112
ER -