Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2004-10-12
in "Trends in Boson Research", p. 35, ed. A. V. Ling (Nova Science, New York, 2006)
Physics
Condensed Matter
Soft Condensed Matter
To appear in "Trends in Boson Research", edited by A. V. Ling (Nova Science, New York, ISBN 1594545219). Better quality figure
Scientific paper
A simple derivation of the static Gross-Pitaevskii (GP) equation is given from an energy variational principle. The result is then generalized heuristically to the time-dependent GP form. With this as background, a number of different experimental areas explored very recently are reviewed, in each case contact being established between the measurements and the predictions of the GP equations. The various limitations of these equations as used on dilute inhomogeneous condensed Boson atomic gases are then summarized, reference also being made to the fact that there is no many-body wave function underlying the GP formulation. This then leads into a discussion of a recently proposed integral equation, derived by taking the Bogoliubov-de Gennes equation as starting point. Some limitations of the static GP differential equation are thereby removed, though it is a matter of further study to determine whether a correlated wave function exists as underpinning for the integral equation formulation.
Angilella Giuseppe G. N.
Bartalini Saverio
Cataliotti Francesco S.
Herrera Ivan
March Norman H.
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