| The sign problem in real-time path integral simulations: using the cumulant action to implement multilevel blocking. | |
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MedLine Citation:
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PMID: 19655855 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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A practical method to tackle the sign problem in real-time path integral simulations is proposed based on the multilevel blocking idea. The formulation is made possible by using a cumulant expansion of the action, which in addition to addressing the sign problem, provides an unbiased estimator for the action from a statistically noisy sample of real-time paths. The cumulant formulation also allows the analytical gradients of the action to be computed with little extra computational effort, and it can easily be implemented in a massively parallel environment. |
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Authors:
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C H Mak |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of chemical physics Volume: 131 ISSN: 1089-7690 ISO Abbreviation: J Chem Phys Publication Date: 2009 Jul |
Date Detail:
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Created Date: 2009-08-06 Completed Date: 2009-10-29 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0375360 Medline TA: J Chem Phys Country: United States |
Other Details:
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Languages: eng Pagination: 044125 Citation Subset: - |
Affiliation:
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Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, USA. mak@tyrosine.usc.edu |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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