DQDPROT

On-the-fly nonadiabatic quantum dynamics suitable for large biomolecules: Developing the DD-vMCG method

Coordinatore	THE UNIVERSITY OF BIRMINGHAM    more  Organization address address: Edgbaston city: BIRMINGHAM postcode: B15 2TT contact info Titolo: Ms. Nome: May Cognome: Chung Email: send email Telefono: 441214000000 Fax: 441214000000
Nazionalità Coordinatore	United Kingdom [UK]
Totale costo	231˙283 €
EC contributo	231˙283 €
Programma	FP7-PEOPLE Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	FP7-PEOPLE-2012-IEF
Funding Scheme	MC-IEF
Anno di inizio	2013
Periodo (anno-mese-giorno)	2013-07-01   -   2015-06-30

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	THE UNIVERSITY OF BIRMINGHAM  Organization address address: Edgbaston city: BIRMINGHAM postcode: B15 2TT contact info Titolo: Ms. Nome: May Cognome: Chung Email: send email Telefono: 441214000000 Fax: 441214000000	UK (BIRMINGHAM)	coordinator	231˙283.20

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 Obiettivo del progetto (Objective)

'Nonadiabatic effects play an important role in many molecular systems, including those of biological relevance. Processes such as photosynthesis, photoreception and bioluminescence are initiated by photoexcitation followed by the evolution of the system with splitting of the nuclear wavepacket in the manifold of electronic states. Nonadiabatic quantum dynamics is a method of choice to study these processes theoretically as the Born-Oppenheimer approximation fails in the regions where electronic and nuclear motions are coupled. The usual approach involves a preliminary calculation of the potential energy surface of the system, which becomes unfeasible with the increase of dimensionality. In order to treat many-atomic systems a direct dynamics variational multi-configuration Gaussian wavepacket (DD-vMCG) method has been developed. It enables on-the-fly potential energy evaluation due to the usage of localized Gaussian functions as a basis set while retaining the full quantum character of the nuclear wavepacket. The method still has a field for improvement, especially with respect to the algorithm of diabatisation as only an approximate version of this is currently implemented. In the current project we therefore aim at upgrading the DD-vMCG method and further applying it to biological systems in which nonadiabatic effects play a role (e.g. the green fluorescent protein). In order to study big systems we plan to use a hybrid quantum mechanical/molecular mechanical approach that allows us to treat the most important part of the system at the quantum mechanical level, while the remainder is treated with less accurate, but much faster classical mechanical methods. We thus will open the doors for the accurate quantum dynamical investigations of biological systems, that were only previously studied using significant approximations.'