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- Title
Linear Response of One-Dimensional Liquid $$^4\hbox {He}$$ to External Perturbations.
- Authors
Motta, M.; Bertaina, G.; Vitali, E.; Galli, D.; Rossi, M.
- Abstract
We study the response of one-dimensional liquid $$^4\hbox {He}$$ to weak perturbations relying on the dynamical structure factor, $$S(q,\omega )$$ , recently obtained via ab-initio techniques (Bertaina et al. in Phys Rev Lett 116:135302, 2016). We evaluate the drag force, $$F_\mathrm{v}$$ , experienced by an impurity moving along the system with velocity v and the static response function, $$\chi (q)$$ , describing the density modulations induced by a periodic perturbation with wave vector q.
- Subjects
LIQUID helium; QUANTUM perturbations; LUTTINGER liquids; SUPERFLUIDITY; DRAG force
- Publication
Journal of Low Temperature Physics, 2017, Vol 187, Issue 5/6, p419
- ISSN
0022-2291
- Publication type
Article
- DOI
10.1007/s10909-016-1704-8