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6 papers

quant-ph2026

Quantum Multiscale Modeling: A Hierarchy of Algorithms for Complex Chemical Systems

Seenivasan Hariharan, Kareljan Schoutens, Sachin Kinge +1

The paper proposes a systematic framework for linking fault‑tolerant quantum algorithms across electronic, atomistic, mesoscopic, and continuum scales in complex chemical systems,…

quant-ph2026

Quantum Walks for Chemical Reaction Networks

Seenivasan Hariharan, Sebastian Zur, Sachin Kinge +3

Near a detailed-balance equilibrium, the perturbed mass-action dynamics of a chemical reaction network (CRN) map exactly onto an electrical-flow problem on the bipartite species-re…

physics.chem-ph2025

Transfer learning of GW-Bethe-Salpeter Equation excitation energies

Dario Baum, Arno Förster, Lucas Visscher

A persistent challenge in machine learning for electronic-structure calculations is the sharp imbalance between abundant low-fidelity data like DFT or TDDFT results and the scarcit…

physics.chem-ph2025

qs quasiparticle and -BSE excitation energies of 133,885 molecules

Dario Baum, Arno Förster, Lucas Visscher

Machine learning applications in the chemical sciences, especially when based on neural networks, critically depend on the availability of large quantities of high quality data. As…

physics.chem-ph2025

Predicting complete basis set limit quasiparticle energies from triple- calculations

Dario Baum, Lucas Visscher, Arno Förster

We present a simple linear model to estimate the basis set incompleteness errors (BSIE) of (vertex-corrected) QP energies based on the kinetic energy of the corresponding orbi…

physics.chem-ph2025

Calculation and analysis of exciton couplings via a subsystem formulation of the -Bethe-Salpeter Equation

Sarathchandra Khandavilli, Arno Förster, Lucas Visscher

We present a fragment-based framework for analyzing exciton couplings within the -Bethe-Salpeter Equation formalism using localized molecular orbitals, and assess how excitonic…