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Damping of elementary excitations in one-dimensional dipolar Bose gases
- Source :
- Physical Review Research, Physical Review Research, American Physical Society, 2020, 2 (3), ⟨10.1103/PhysRevResearch.2.033337⟩, Physical Review Research, American Physical Society, 2020, 2 (3), pp.033337. ⟨10.1103/PhysRevResearch.2.033337⟩, Physical review research
- Publication Year :
- 2020
- Publisher :
- HAL CCSD, 2020.
-
Abstract
- In the presence of dipolar interactions the excitation spectrum of a Bose gas can acquire a local minimum. The corresponding quasiparticles are known as rotons. They are gaped and do not decay at zero temperature. Here we study the decay of rotons in one-dimensional Bose gases at low temperatures. It predominantly occurs due to the backscattering of thermal phonons on rotons. The resulting rate scales with the third power of temperature and is inversely proportional to the sixth power of the roton gap near the solidification phase transition. The hydrodynamic approach used here enables us to find the decay rate for quasiparticles at practically any momenta, with minimal assumptions on the exact form of the interparticle interactions. Our results are an essential prerequisite for the description of all the dissipative phenomena in dipolar gases and have direct experimental relevance.<br />6 pages, 3 figures
- Subjects :
- Bose gas
Phonon
Atomic Physics (physics.atom-ph)
FOS: Physical sciences
Roton
7. Clean energy
01 natural sciences
010305 fluids & plasmas
Physics - Atomic Physics
Superfluidity
Supersolid
0103 physical sciences
[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]
010306 general physics
ComputingMilieux_MISCELLANEOUS
Boson
Physics
Condensed Matter::Quantum Gases
[PHYS]Physics [physics]
Condensed matter physics
Condensed Matter::Other
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
Quantum Gases (cond-mat.quant-gas)
Quasiparticle
Condensed Matter - Quantum Gases
Superfluid helium-4
Subjects
Details
- Language :
- English
- ISSN :
- 26431564
- Database :
- OpenAIRE
- Journal :
- Physical Review Research, Physical Review Research, American Physical Society, 2020, 2 (3), ⟨10.1103/PhysRevResearch.2.033337⟩, Physical Review Research, American Physical Society, 2020, 2 (3), pp.033337. ⟨10.1103/PhysRevResearch.2.033337⟩, Physical review research
- Accession number :
- edsair.doi.dedup.....f02463dc3188904abb7725d2ca1b792a