Sökning: onr:"swepub:oai:gup.ub.gu.se/66704" >
Comparison of Appro...
-
Hone, Tyler D
(författare)
Comparison of Approximate Quantum Simulation Methods Applied to Normal Liquid Helium at 4 K
- Artikel/kapitelEngelska2007
Förlag, utgivningsår, omfång ...
-
2007-11-21
-
American Chemical Society (ACS),2007
Nummerbeteckningar
-
LIBRIS-ID:oai:gup.ub.gu.se/66704
-
https://gup.ub.gu.se/publication/66704URI
-
https://doi.org/10.1021/jp075022nDOI
Kompletterande språkuppgifter
Ingår i deldatabas
Klassifikation
-
Ämneskategori:ref swepub-contenttype
-
Ämneskategori:art swepub-publicationtype
Anmärkningar
-
The Feynman-Kleinert linearized path integral molecular dynamics (FK-LPI), ring polymer molecular dynamics (RPMD), and centroid molecular dynamics (CMD) methods are applied to the simulation of normal liquid helium. Comparisons of the simulation results at the T = 4 K and = 0.01873 Å-3 state point are presented. The calculated quantum correlation functions for the three methods show significant differences, both in the short time and in the intermediate regions of the spectrum. Our simulation results are also compared to the recent results of other approximate quantum simulation methods. We find that FK-LPI qualitatively agrees with other approximate quantum simulation results while CMD and RPMD predict a qualitatively different impulsive rebound in the velocity autocorrelation function. Frequency space analysis reveals that RPMD exhibits a broad high-frequency tail similar to that from quantum mode coupling theory and numerical analytic continuation approaches, while FK-LPI provides a somewhat more rapid decay at high frequency than any of these three methods. CMD manifests a high-frequency component that is greatly reduced compared with the other methods.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
-
Poulsen, Jens Aage,1972Gothenburg University,Göteborgs universitet,Institutionen för kemi,Department of Chemistry(Swepub:gu)xpouje
(författare)
-
Rossky, Peter J
(författare)
-
Manolopoulos, David E
(författare)
-
Göteborgs universitetInstitutionen för kemi
(creator_code:org_t)
Sammanhörande titlar
-
Ingår i:The journal of physical chemistry. B: American Chemical Society (ACS)112:21520-61061520-5207
Internetlänk
Hitta via bibliotek
Till lärosätets databas