TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysCore.8.4.069
TI  - Domain-wall melting and entanglement in free-fermion chains with a band structure
PY  - 2025/10/14
UR  - https://www.scipost.org/SciPostPhysCore.8.4.069
JF  - SciPost Physics Core
JA  - SciPost Phys. Core
VL  - 8
IS  - 4
SP  - 069
A1  - Eisler, Viktor
AB  - We study the melting of a domain wall in free-fermion chains, where the periodic variation of the hopping amplitudes gives rise to a band structure. It is shown that the entanglement grows logarithmically in time, and the prefactor is proportional to the number of filled bands in the initial state. For a dimerized chain the particle density and current are found to have the same expressions as in the homogeneous case, up to a rescaling of the velocity. The universal contribution to the entropy profile is then doubled, while the non-universal part can be extracted numerically from block-Toeplitz matrices.
ER  -

@Article{10.21468/SciPostPhysCore.8.4.069,
	title={{Domain-wall melting and entanglement in free-fermion chains with a band structure}},
	author={Viktor Eisler},
	journal={SciPost Phys. Core},
	volume={8},
	pages={069},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhysCore.8.4.069},
	url={https://scipost.org/10.21468/SciPostPhysCore.8.4.069},
}