TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysCore.7.3.049
TI  - Bound impurities in a one-dimensional Bose lattice gas: Low-energy properties and quench-induced dynamics
PY  - 2024/07/31
UR  - https://scipost.org/SciPostPhysCore.7.3.049
JF  - SciPost Physics Core
JA  - SciPost Phys. Core
VL  - 7
IS  - 3
SP  - 049
A1  - Isaule, Felipe
AU  - Rojo-Francàs, Abel
AU  - Juliá-Díaz, Bruno
AB  - We study two mobile bosonic impurities immersed in a one-dimensional optical lattice and interacting with a bosonic bath. We employ the exact diagonalization method for small periodic lattices to study stationary properties and dynamics. We consider the branch of repulsive interactions that induce the formation of bound impurities, akin to the bipolaron problem. A comprehensive study of ground-state and low-energy properties is presented, including an examination of the interaction strengths which induce the formation of a bound dimer of impurities. We also study the dynamics induced after an interaction quench to examine the stability of the bound dimers. We reveal that after large interaction quenches from strong to weak interactions the system can show large oscillations over time with revivals of the dimer states. We find that the oscillations are driven by selected eigenstates with phase-separated configurations.
ER  -

@Article{10.21468/SciPostPhysCore.7.3.049,
	title={{Bound impurities in a one-dimensional Bose lattice gas: Low-energy properties and quench-induced dynamics}},
	author={Felipe Isaule and Abel Rojo-Francàs and Bruno Juliá-Díaz},
	journal={SciPost Phys. Core},
	volume={7},
	pages={049},
	year={2024},
	publisher={SciPost},
	doi={10.21468/SciPostPhysCore.7.3.049},
	url={https://scipost.org/10.21468/SciPostPhysCore.7.3.049},
}