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Zur Quantentheorie der Strahlung

Albert Einstein
- Vol. 18, pp 47
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TLDR
In this paper, the spectral distribution curve of temperature radiation was shown to be similar to the velocity distribution of the electromagnetic spectrum of a single photon, and the formal similarity of spectral distribution curves to Maxwell's velocity distribution curve was revealed.
Abstract
The formal similarity of the spectral distribution curve of temperature radiation to Maxwell’s velocity distribution curve is too striking to have remained hidden very long.

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Citations
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Modeling upconversion of erbium doped microcrystals based on experimentally determined Einstein coefficients

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Optical pumping of trapped neutral molecules by blackbody radiation.

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Dielectric microspheres as optical cavities: Einstein A and B coefficients and level shift

TL;DR: In this paper, the rates of spontaneous emission and stimulated emission and absorption for a two-level atom in a dielectric microsphere are calculated for weak E1 coupling.
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Topics in non-equilibrium quantum statistical mechanics

TL;DR: In this article, Jaksic et al. presented a method to solve a set of problems in the Zentrum Mathematik M5, Technische Universitat Munchen, D-85747 Garching, Germany.