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This essay presents a theoretical description of the superradiance phenomenon, in which both the quantal and the classical aspects are discussed. Starting from the simple two-level atom-small sample Dicke model, we successively introduce various complications inherent to a realistic superradiance experiment: effects of Van der Waals interaction between the atoms, propagation and diffraction of the electromagnetic field in the sample and finally the effects related to atomic level degeneracy or near degeneracy. We recall how to calculate the field radiated by a superradiant system in a single experiment and how to determine, for a series of identically prepared superradiant samples, the large shot to shot fluctuations of the emitted light properties. The presentation tries to unify various points of view and formalisms developed in previous works and to introduce simply and progressively the basic physical concepts relevant to the superradiance phenomenon.
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There are 19 references cited in this article, which can be found at the bottom of the page.
This article was co-authored by Christopher Taylor, PhD. Christopher Taylor is an Adjunct Assistant Professor of English at Austin Community College in Texas. He received his PhD in English Literature and Medieval Studies from the University of Texas at Austin in 2014.

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Writing an essay can be thought of as a process, and as such you may ﬁnd it helpful to break down the task of essay-writing into a number of stages. Here you’ll find a suggested approach to follow.
As a student, you will find that it is essential to master the skill of writing well-reasoned, articulate, and well-presented essays. You will usually need to write essays as part of your coursework and in exams, and you may also be required to submit a dissertation (also called an extended essay or a thesis) in order to achieve a degree or similar qualification. As you progress in your course of study, you will realize that, in addition to being crucial to gaining good grades and therefore a good qualification, successful essay-writing is also vital to successful learning.

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References:

http://www.wikihow.com/Write-an-Essay
http://www.collegeessayguy.com/
http://www.lexico.com/grammar/writing-help/writing-essays
http://www.masterclass.com/articles/guide-to-common-types-of-essays
http://www.wikihow.com/Write-an-Essay