TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysCore.8.4.080
TI  - Numerical study of disordered noninteracting chains coupled to a local Lindblad bath
PY  - 2025/11/10
UR  - https://www.scipost.org/SciPostPhysCore.8.4.080
JF  - SciPost Physics Core
JA  - SciPost Phys. Core
VL  - 8
IS  - 4
SP  - 080
A1  - Berger, Viktor
AU  - Nava, Andrea
AU  - Bardarson, Jens H
AU  - Artiaco, Claudia
AB  - Disorder can prevent many-body quantum systems from reaching thermal equilibrium, leading to a many-body localized phase. Recent works suggest that nonperturbative effects caused by rare regions of low disorder may destabilize the localized phase. However, numerical simulations of interacting systems are generically possible only for small system sizes, where finite-size effects might dominate. Here we perform a numerical investigation of noninteracting disordered spin chains coupled to a local Lindblad bath at the boundary. Our results reveal strong finite-size effects in the Lindbladian gap in both bath-coupled Anderson and Aubry-André-Harper models, leading to a non-monotonic behavior with the system size. We discuss the relaxation properties of a simple toy model coupled to local Lindblad baths, connecting its features to those of noninteracting localized chains. We comment on the implications of our findings for many-body systems.
ER  -

@Article{10.21468/SciPostPhysCore.8.4.080,
	title={{Numerical study of disordered noninteracting chains coupled to a local Lindblad bath}},
	author={Viktor Berger and Andrea Nava and Jens Hjorleifur Bardarson and Claudia Artiaco},
	journal={SciPost Phys. Core},
	volume={8},
	pages={080},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhysCore.8.4.080},
	url={https://scipost.org/10.21468/SciPostPhysCore.8.4.080},
}