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Decay of Bogoliubov quasiparticles in a nonideal one-dimensional Bose gas
- Source :
- Physical Review B: Condensed Matter and Materials Physics (1998-2015), Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2014, 89, pp.180507(R). ⟨10.1103/PhysRevB.89.180507⟩
- Publication Year :
- 2014
- Publisher :
- American Physical Society (APS), 2014.
-
Abstract
- We study the relaxation of excitations in a system of one-dimensional weakly interacting bosons. Due to residual weak interactions, Bogoliubov quasiparticles in this system have finite lifetimes. As a result of the conservation laws in one dimension, at zero temperature the leading mechanism of decay of a quasiparticle is disintegration into three others. We focus on phonon quasiparticles and find that their decay rate is proportional to the seventh power of momentum. In the integrable case of contact interaction between the bosons, the decay rate vanishes.<br />Comment: four pages, one figure
- Subjects :
- [PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas]
Integrable system
Bose gas
Phonon
FOS: Physical sciences
01 natural sciences
010305 fluids & plasmas
Momentum
Condensed Matter - Strongly Correlated Electrons
Condensed Matter::Superconductivity
Quantum mechanics
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
0103 physical sciences
010306 general physics
Boson
Physics
Conservation law
Condensed Matter - Mesoscale and Nanoscale Physics
Strongly Correlated Electrons (cond-mat.str-el)
Condensed Matter Physics
Electronic, Optical and Magnetic Materials
Quantum Gases (cond-mat.quant-gas)
Quantum electrodynamics
Quasiparticle
Relaxation (physics)
Condensed Matter::Strongly Correlated Electrons
Condensed Matter - Quantum Gases
Subjects
Details
- ISSN :
- 1550235X and 10980121
- Volume :
- 89
- Database :
- OpenAIRE
- Journal :
- Physical Review B
- Accession number :
- edsair.doi.dedup.....e7686da7f3ca6b9f3aa3a99fb6d9f100