Impurity and soliton dynamics in a Fermi gas with nearest-neighbor interactions

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2017-06-07
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Language
en
Pages
1-12
Series
Physical Review A, Volume 95, issue 6
Abstract
We study spinless fermions with repulsive nearest-neighbor interactions perturbed by an impurity particle or a local potential quench. Using the numerical time-evolving block decimation method and a simplified analytic model, we show that the perturbations create a soliton-antisoliton pair. If solitons are already present in the bath, the two excitations have a drastically different dynamics: The antisoliton does not annihilate with the solitons and is therefore confined close to its origin while the soliton excitation propagates. We discuss the consequences for experiments with ultracold gases.
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| openaire: EC/FP7/340748/EU//CODE
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Citation
Visuri , A M , Törmä , P & Giamarchi , T 2017 , ' Impurity and soliton dynamics in a Fermi gas with nearest-neighbor interactions ' , Physical Review A , vol. 95 , no. 6 , 063605 , pp. 1-12 . https://doi.org/10.1103/PhysRevA.95.063605