Impurity and soliton dynamics in a Fermi gas with nearest-neighbor interactions
Research output: Contribution to journal › Article › Scientific › peer-review
- University of Geneva
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.
|Journal||Physical Review A|
|Publication status||Published - 7 Jun 2017|
|MoE publication type||A1 Journal article-refereed|