Collective Atom–Light Interactions in Dense Atomic Vapours by James Keaveney
By James Keaveney
The propagation of sunshine in 'dense media' the place dipole-dipole interactions play a task is a basic subject that used to be first studied within the paintings of Clausius, Mossotti, Lorenz and Lorentz within the latter half the 19th century. although, until eventually lately there remained a few components of controversy: for instance, while the Lorentz version for a gasoline predicts a resonance shift, a discrete dipole version doesn't. This thesis makes the 1st mixed size of either the Lorentz shift and the linked collective Lamb shift. This transparent experimental consequence inspired new theoretical paintings that has considerably complicated our realizing of sunshine propagation in interacting media.
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3 Histogram of atomic interaction times as a function of position in the cell, calculated from the Monte-Carlo model detailed in the main text. 0 0 λ/2 Cell position λ atoms that are modelled with the bimodal velocity distribution, so this MC method gives us an estimate of how many ‘slow’ atoms there are compared to the amount that we attribute to the full Doppler average. The cell is split into segments with a width in the propagation direction ψz. The time the i-th atom spends traversing the region between position z and z+ψz depends on the component of its velocity in the z-direction, vz .