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Impurity and soliton dynamics in a Fermi gas with nearest-neighbor interactions
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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Physical Review A, Volume 95, issue 6, pp. 1-12
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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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