Article (Scientific journals)
Mechanical Resonances of Mobile Impurities in a One-Dimensional Quantum Fluid
Schmidt, Thomas; Dolcetto, Giacomo; Pedder, Christopher et al.
2019In Physical Review Letters, 123, p. 075302
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Abstract :
[en] 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.
Disciplines :
Physics
Author, co-author :
Schmidt, Thomas ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Dolcetto, Giacomo
Pedder, Christopher
Le Hur, Karyn
Orth, Peter
External co-authors :
yes
Language :
English
Title :
Mechanical Resonances of Mobile Impurities in a One-Dimensional Quantum Fluid
Publication date :
August 2019
Journal title :
Physical Review Letters
ISSN :
1079-7114
Publisher :
American Physical Society, New York, United States - New York
Volume :
123
Pages :
075302
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Physics and Materials Science
Available on ORBilu :
since 13 January 2020

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