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Polynomially scaling spin dynamics simulation algorithm based on adaptive state-space restriction.

Kuprov, I. and Wagner-Rundell, N. and Hore, P. J. (2007) 'Polynomially scaling spin dynamics simulation algorithm based on adaptive state-space restriction.', Journal of magnetic resonance., 189 (2). pp. 241-250.

Abstract

We report progress with an old problem in magnetic resonance—that of the exponential scaling of simulation complexity with the number of spins. It is demonstrated below that a polynomially scaling algorithm can be obtained (and accurate simulations performed for over 200 coupled spins) if the dimension of the Liouville state space is reduced by excluding unimportant and unpopulated spin states. We found the class of such states to be surprisingly wide. It actually appears that a majority of states in large spin systems are not essential in magnetic resonance simulations and can safely be dropped from the state space. In restricted state spaces the spin dynamics simulations scale polynomially. In cases of favourable interaction topologies (sparse graphs, e.g. in protein NMR) the asymptotic scaling is linear, opening the way to direct fitting of molecular structures to experimental spectra.

Item Type:Article
Additional Information:
Keywords:NMR, EPR, Spin, Simulation, Polynomial scaling.
Full text:Full text not available from this repository.
Publisher Web site:http://dx.doi.org/10.1016/j.jmr.2007.09.014
Record Created:23 Jan 2008
Last Modified:08 Apr 2009 16:37

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