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Fluctuation and interaction induced instability of dark solitons in single and binary condensates
- Publication Year :
- 2014
- Publisher :
- arXiv, 2014.
-
Abstract
- We show that the presence of soliton in a single-species condensate, at zero temperature, enhances the quantum depletion sufficient enough to induce dynamical instability of the system. We also predict that for two-species condensates, two Goldstone modes emerge in the excitation spectrum at phase separation. Of these, one is due to the presence of the soliton. We use Hartree-Fock-Bogoliubov theory with Popov approximation to examine the mode evolution, and demonstrate that when the anomalous mode collides with a higher energy mode it renders the solitonic state oscillatory unstable. We also report soliton induced change in the topology of the density profiles of the two-species condensates at phase-separation.<br />Comment: arXiv admin note: text overlap with arXiv:1307.5716
- Subjects :
- Physics
Condensed Matter::Quantum Gases
Mode (statistics)
Binary number
FOS: Physical sciences
Instability
Atomic and Molecular Physics, and Optics
Quantum Gases (cond-mat.quant-gas)
Quantum electrodynamics
Soliton
Zero temperature
Condensed Matter - Quantum Gases
Quantum
Topology (chemistry)
Excitation
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....435eb51bfcaea4bd792f65665da805c9
- Full Text :
- https://doi.org/10.48550/arxiv.1405.6459