Collective Modes of a Soliton Train in a Fermi Superfluid.
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Publication Date
2017-06-30Journal Title
Phys Rev Lett
ISSN
0031-9007
Publisher
American Physical Society (APS)
Volume
118
Issue
26
Pages
260402
Language
eng
Type
Article
This Version
VoR
Physical Medium
Print-Electronic
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Dutta, S., & Mueller, E. J. (2017). Collective Modes of a Soliton Train in a Fermi Superfluid.. Phys Rev Lett, 118 (26), 260402. https://doi.org/10.1103/PhysRevLett.118.260402
Abstract
We characterize the collective modes of a soliton train in a quasi-one-dimensional Fermi superfluid, using a mean-field formalism. In addition to the expected Goldstone and Higgs modes, we find novel long-lived gapped modes associated with oscillations of the soliton cores. The soliton train has an instability that depends strongly on the interaction strength and the spacing of solitons. It can be stabilized by filling each soliton with an unpaired fermion, thus forming a commensurate Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase. We find that such a state is always dynamically stable, which paves the way for realizing long-lived FFLO states in experiments via phase imprinting.
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External DOI: https://doi.org/10.1103/PhysRevLett.118.260402
This record's URL: https://www.repository.cam.ac.uk/handle/1810/299191
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