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Updated: Sep 27, 2026

Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method
Published on: July 19, 2019
Modular integration of MRSF-TDDFT, NAMD, and QM/MM for excited-state dynamics on the OpenQP platform
Mohsen Mazaherifar1, Woojin Park1, Simone Bonfrate2
1Department of Chemistry, Kyungpook National University, Daegu 41566, South Korea. cchoi@knu.ac.kr.
Abstract:
A balanced and efficient description of excited states is essential for accurately capturing ultrafast relaxation processes. In this context, the recently developed mixed-reference spin-flip time-dependent density functional theory (MRSF-TDDFT) has demonstrated strong performance. However, its broader applicability to realistic systems requires seamless integration with multiscale simulation frameworks. In this work, we present a modular strategy that integrates MRSF-TDDFT with nonadiabatic molecular dynamics (NAMD) and electrostatic potential fitting (ESPF)-based QM/MM embedding methodologies, in which OpenQP (Open Quantum Platform) serves as a modular electronic-structure backend. To further enhance usability and interoperability, we introduce the Open Simulation Manager (OpenSM), a high-level orchestration framework that unifies QM, QM/MM, and NAMD workflows through a consistent and minimal input interface. The resulting OpenQP-OpenSM provides a flexible and extensible platform for multiscale excited-state simulations, enabling rapid integration of advanced electronic-structure methods and fostering collaborative development.
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