Download or read book Collective Atom–Light Interactions in Dense Atomic Vapours written by James Keaveney and published by Springer. This book was released on 2014-05-24 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: The propagation of light in 'dense media' where dipole-dipole interactions play a role is a fundamental topic that was first studied in the work of Clausius, Mossotti, Lorenz and Lorentz in the latter half of the nineteenth century. However, until recently there remained some areas of controversy: for example, whereas the Lorentz model for a gas predicts a resonance shift, a discrete dipole model does not. This thesis makes the first combined measurement of both the Lorentz shift and the associated collective Lamb shift. This clear experimental result stimulated new theoretical work that has significantly advanced our understanding of light propagation in interacting media.