The resonance fluorescence cascade of a laser-excited two-level atom

Reynaud, Serge

doi:10.1186/s13662-023-03763-7

Adv Cont Discr Mod

2023

DOI: 10.1186/s13662-023-03763-7

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The resonance fluorescence cascade of a laser-excited two-level atom

Serge Reynaud

Abstract: The cascade of fluorescence photons by a two-level atom excited by coherent laser light is reviewed. The discussion emphasizes the random nature of resonance fluorescence and uses the distribution of delays between two successively emitted photons as the primary characterization of the process. Other characterizations such as photon counting and photon correlation are deduced.

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On the statistical background of quantum mechanics: generalities and a concrete example

Berre

Pomeau

2023

Adv Cont Discr Mod

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We revisit our description of randomness in quantum processes that began in collaboration of Jean Ginibre. The calculations were performed on a worked example: the fluorescence of a single two-level atom pumped by a resonant laser field. This pump laser is described classically (by a function, not an operator). Our aim is first to built a Kolmogorov-type equation (K-equation) for the atomic state, so that the two parameters θ, φ that define this density matrix are random functions of time, therefore the atomic density matrix is a random density matrix. Such an approach, initiated for gas kinetics, was not yet applied to quantum phenomena, whereas it is especially tailored to very quick events well separated (in time) like the quantum jumps observed in spontaneous emission of photons by an atom. Here, we try to clarify the basis of our statistical approach leading to the K-equation below, and we present the main results deduced from it. We explain finally that our approach can be interpreted in terms of Everett’s theory of many-worlds, because at every emission a new history begins for the atom, with two nonoverlapping wave functions.

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On the statistical background of quantum mechanics: generalities and a concrete example

Berre

Pomeau

2023

Adv Cont Discr Mod

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The resonance fluorescence cascade of a laser-excited two-level atom

Cited by 1 publication

References 93 publications

On the statistical background of quantum mechanics: generalities and a concrete example

On the statistical background of quantum mechanics: generalities and a concrete example

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