Interaction-driven dynamics in graphene flakes as a benchmark for quantum simulation
Abstract
We study interaction-driven ultrafast dynamics in finite graphene flakes following an optical pump quench in an interacting tight-binding model. By comparing exact real-time evolution with simulations restricted to particle-hole excitation subspaces, we assess when relaxation can be captured by low-order many-body processes and when this is not sufficient. The single-particle orbital entropy provides a compact diagnostic for dynamic correlation growth. For the systems studied here, periodic graphene flakes are well described by low-order excitations, whereas confined geometries require substantial higher-order contributions even for relatively small interaction strengths. The quench protocol combines simple initial-state preparation with strongly correlated dynamics, identifying a promising benchmark problem for future quantum-computing simulations.
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BibTeX
@misc{eickhoff2026interactiondriven,
title = {{Interaction-driven dynamics in graphene flakes as a benchmark for quantum simulation}},
author = {Fabian Eickhoff and Satoshi Ejima and Lukas Windgätter and Florian G. Eich and Hannah Rittich and Sebastian Zanker and Peter Schmitteckert},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2606.10548},
eprint = {2606.10548},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2606.10548},
}
RIS
TY - UNPB
TI - Interaction-driven dynamics in graphene flakes as a benchmark for quantum simulation
AU - Fabian Eickhoff
AU - Satoshi Ejima
AU - Lukas Windgätter
AU - Florian G. Eich
AU - Hannah Rittich
AU - Sebastian Zanker
AU - Peter Schmitteckert
PY - 2026
DA - 2026/08/31
PB - arXiv
DO - 10.48550/arxiv.2606.10548
UR - https://arxiv.org/abs/2606.10548
AB - We study interaction-driven ultrafast dynamics in finite graphene flakes following an optical pump quench in an interacting tight-binding model. By comparing exact real-time evolution with simulations restricted to particle-hole excitation subspaces, we assess when relaxation can be captured by low-order many-body processes and when this is not sufficient. The single-particle orbital entropy provides a compact diagnostic for dynamic correlation growth. For the systems studied here, periodic graphene flakes are well described by low-order excitations, whereas confined geometries require substantial higher-order contributions even for relatively small interaction strengths. The quench protocol combines simple initial-state preparation with strongly correlated dynamics, identifying a promising benchmark problem for future quantum-computing simulations.
ER -