TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.18.1.015
TI  - Ballistic conductance with and without disorder in a boundary-driven XXZ spin chain
PY  - 2025/01/14
UR  - https://scipost.org/SciPostPhys.18.1.015
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 18
IS  - 1
SP  - 015
A1  - McRoberts, Adam
AU  - Moessner, Roderich
AB  - Motivated by recent experiments on Google's sycamore NISQ platform on the spin transport resulting from a non-unitary periodic boundary drive of an XXZ chain, we study a classical variant thereof by a combination of analytical and numerical means. We find the classical model reproduces the quantum results in remarkable detail, and provides an analytical handle on the nature and shape of the spin transport's three distinct regimes: ballistic (easy-plane), subdiffusive (isotropic) and insulating (easy-axis). Further, we show that this phenomenology is remarkably robust to the inclusion of bond disorder – albeit that the transient dynamics approaching the steady states differs qualitatively between the clean and disordered cases – providing an accessible instance of ballistic transport in a disordered setting.
ER  -

@Article{10.21468/SciPostPhys.18.1.015,
	title={{Ballistic conductance with and without disorder in a boundary-driven XXZ spin chain}},
	author={Adam J. McRoberts and Roderich Moessner},
	journal={SciPost Phys.},
	volume={18},
	pages={015},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.18.1.015},
	url={https://scipost.org/10.21468/SciPostPhys.18.1.015},
}