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- W4313462619 abstract "The propagation of a photon in an atomic medium can be seen as a L'evy-flight random walk where the probability distribution $P(z)$ for the photon step length $z$ scales with ${z}^{ensuremath{-}(ensuremath{alpha}+1)}$, with $0<ensuremath{alpha}<2$. In atomic vapors, previous work reported the value of $ensuremath{alpha}$ obtained from direct measurement of $P(z)$ and also from the dependence of transmission on sample opacity, both for Doppler and Lorentz profiles. In this work, we report the measurement of $ensuremath{alpha}$ in a Cs cell from the scaling of transmission with starting point, i.e., the average penetration depth of the photon in the medium before the first scattering event. We show that the parameter $ensuremath{alpha}$ depends on the size of the system and on the probability that an atom suffers a collision before spontaneous emission. The measured $ensuremath{alpha}$ parameter corresponds to the expectation value for $P(z=L)$, with $L$ the size of the system, which is consistent with the so-called single-big-jump principle that states that a single jump rules the transport." @default.
- W4313462619 created "2023-01-06" @default.
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- W4313462619 date "2023-01-03" @default.
- W4313462619 modified "2023-09-25" @default.
- W4313462619 title "Dependence of Lévy-flight transmission on the starting point for photons propagating in atomic vapors" @default.
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- W4313462619 doi "https://doi.org/10.1103/physreva.107.013501" @default.
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