Volume 96, Number 2, October 2011
|Number of page(s)||4|
|Section||Atomic, Molecular and Optical Physics|
|Published online||27 September 2011|
An accurate and compact wave function for the 4He dimer
Dipartimento di Scienze Chimiche e Ambientali, Università dell'Insubria - Via Lucini 3, I-22100 Como, Italy, EU
Accepted: 25 August 2011
We introduce a local measure of the quality of a trial wave function: the local variance. Using this tool we examine the pair function often adopted to construct wave functions for small helium clusters and apply it to a wave function for 4He2 using the TTY interaction potential. Our analysis shows that this commonly employed functional form should be improved in the short-range region. We introduce a new model based on the short-range behaviour of the exact ground-state solution of a Morse potential. The resulting compact trial wave function for 4He2 recovers 98% of the exact binding energy with only six variational parameters.
PACS: 36.40.-c – Atomic and molecular clusters / 31.15.xt – Variational techniques
© EPLA, 2011
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.