We study the response of one-dimensional liquid (Formula presented.) to weak perturbations relying on the dynamical structure factor, (Formula presented.), recently obtained via ab-initio techniques (Bertaina et al. in Phys Rev Lett 116:135302, 2016). We evaluate the drag force, (Formula presented.), experienced by an impurity moving along the system with velocity v and the static response function, (Formula presented.), describing the density modulations induced by a periodic perturbation with wave vector q.
Linear Response of One-Dimensional Liquid 4He to External Perturbations / M. Motta, G. Bertaina, E. Vitali, D.E. Galli, M. Rossi. - In: JOURNAL OF LOW TEMPERATURE PHYSICS. - ISSN 0022-2291. - 187:5-6(2017 Jun), pp. 419-426. [10.1007/s10909-016-1704-8]
Linear Response of One-Dimensional Liquid 4He to External Perturbations
G. Bertaina
;D.E. GalliPenultimo
;
2017
Abstract
We study the response of one-dimensional liquid (Formula presented.) to weak perturbations relying on the dynamical structure factor, (Formula presented.), recently obtained via ab-initio techniques (Bertaina et al. in Phys Rev Lett 116:135302, 2016). We evaluate the drag force, (Formula presented.), experienced by an impurity moving along the system with velocity v and the static response function, (Formula presented.), describing the density modulations induced by a periodic perturbation with wave vector q.
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