کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5407383 1393214 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Polynomially scaling spin dynamics simulation algorithm based on adaptive state-space restriction
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Polynomially scaling spin dynamics simulation algorithm based on adaptive state-space restriction
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetic Resonance - Volume 189, Issue 2, December 2007, Pages 241-250
نویسندگان
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