Solitons in a one-dimensional Wigner crystal
arXiv:1409.6721 · doi:10.1103/PhysRevB.91.165416
Abstract
In one-dimensional quantum systems with strong long-range repulsion particles arrange in a quasi-periodic chain, the Wigner crystal. We demonstrate that besides the familiar phonons, such one-dimensional Wigner crystal supports an additional mode of elementary excitations, which can be identified with solitons in the classical limit. We compute the corresponding excitation spectrum and argue that the solitons have a parametrically small decay rate at low energies. We discuss implications of our results for the behavior of the dynamic structure factor.
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Cited by in corpus (6)
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- Decay of Bogoliubov excitations in one-dimensional Bose gases
- Viscous Dissipation in One-Dimensional Quantum Liquids
- Effective mass of elementary excitations in Galilean-invariant integrable models
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