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An introduction to dispersive interactions

M M Taddei1, T N C Mendes2 and C Farina1

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Dispersive forces are a kind of van der Waals intermolecular force which could only be fully understood with the establishment of quantum mechanics and, in particular, of quantum electrodynamics. In this pedagogical paper, we introduce the subject in a more elementary approach, aiming at students with basic knowledge of quantum mechanics. We perform original calculations using a semiclassical method by the name of the fluctuating-dipole method, and focus primarily on the interaction of atoms with macroscopic bodies, in particular with a spherical, less usual geometry.


PACS

01.50.-i Educational aids

12.20.Ds Specific calculations

03.65.Sq Semiclassical theories and applications

02.40.-k Geometry, differential geometry, and topology

03.65.Ta Foundations of quantum mechanics; measurement theory

Subjects

Mathematical physics

Education and communication

Quantum information and quantum mechanics

Particle physics and field theory

Dates

Issue 1 (January 2010)

Received 22 July 2009, in final form 8 October 2009

Published 4 November 2009



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