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Mechanical Resonances of Mobile Impurities in a One-Dimensional Quantum Fluid.
Schmidt, Thomas L; Dolcetto, Giacomo; Pedder, Christopher J; Le Hur, Karyn; Orth, Peter P.
Affiliation
  • Schmidt TL; Physics and Materials Science Research Unit, University of Luxembourg, L-1511 Luxembourg.
  • Dolcetto G; Physics and Materials Science Research Unit, University of Luxembourg, L-1511 Luxembourg.
  • Pedder CJ; Physics and Materials Science Research Unit, University of Luxembourg, L-1511 Luxembourg.
  • Le Hur K; CPHT, CNRS, Institut Polytechnique de Paris, Route de Saclay, 91128 Palaiseau, France.
  • Orth PP; Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA.
Phys Rev Lett ; 123(7): 075302, 2019 Aug 16.
Article in En | MEDLINE | ID: mdl-31491113
ABSTRACT
We study a one-dimensional interacting quantum liquid hosting a pair of mobile impurities causing backscattering. We determine the effective retarded interaction between the two impurities mediated by the liquid. We show that for strong backscattering this interaction gives rise to resonances and antiresonances in the finite-frequency mobility of the impurity pair. At the antiresonances, the two impurities remain at rest even when driven by a (small) external force. At the resonances, their synchronous motion follows the external drive in phase and reaches maximum amplitude. Using a perturbative renormalization group analysis in quantum tunneling across the impurities, we study the range of validity of our model. We predict that these mechanical antiresonances are observable in experiments on ultracold atom gases confined to one dimension.

Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Phys Rev Lett Year: 2019 Document type: Article

Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Phys Rev Lett Year: 2019 Document type: Article