Classical to path-integral adaptive resolution in molecular simulation: towards a smooth quantum-classical coupling.
Phys Rev Lett
; 104(25): 250201, 2010 Jun 25.
Article
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| MEDLINE
| ID: mdl-20867349
ABSTRACT
Simulations that couple different molecular models in an adaptive way by changing resolution on the fly allow us to identify the relevant degrees of freedom of a system. This, in turn, leads to a detailed understanding of the essential physics which characterizes a system. While the delicate process of transition from one model to another is well understood for the adaptivity between classical molecular models the same cannot be said for the quantum-classical adaptivity. The main reason for this is the difficulty in describing a continuous transition between two different kinds of physical principles probabilistic for the quantum and deterministic for the classical. Here we report the basic principles of an algorithm that allows for a continuous and smooth transition by employing the path integral description of atoms.
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Phys Rev Lett
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2010
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Article