Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Latin America Optics and Photonics Conference

Propagation of Photons in a Resonant Atomic Vapor

Samuel B. Alves, J. C. de Aquino Carvalho, Hugo L. D. de S. Cavalcante, Thierry Passerat de Silans, Marcos Oriá, Martine Chevrollier

Published Jan 1, 2016• 0 citations
Publisher

Abstract

A few statistical aspects of photons propagation in resonant atomic vapors are investigated, from Lévy flights and frequency redistribution to nonlinearity-mediated interactions between photons and their effect on the intensity distribution and correlation.
DOI
10.1364/laop.2016.ltu5b.2

Related papers

Propagation of photons in resonant vapors as Lévy flights: influence of sample size in measurable parameters

A. S. M. Macedo, J. P. Lopez, Thierry Passerat de Silans

We explore the interaction between a laser and a resonant atomic vapor as a platform to investigate Lévy flight superdiffusion. We investigate the influence of system size on the photons random walk characteristics.

Latin America Optics and Photonics Conference•Jan 1, 2022•0 citations

Frequency redistribution and step-size distribution of light scattered by atomic vapor: Applications to Lévy flight random walk

I.C. Nunes, M. Araujo, J. P. Lopez +1 more

arXiv:2411.18570•Journal of Quantitative Spectroscopy and Radiative Transfer•May 4, 2025•3 citations

Redistribution of light frequency by multiple scattering in a resonant atomic vapor

J. C. de Aquino Carvalho, Marcos Oriá, Martine Chevrollier +2 more

The propagation of light in a resonant atomic vapor can a priori be thought of as a multiple scattering process, in which each scattering event redistributes both the direction and the frequency of the photons. Particularly, the frequency redistribution may result in L\'evy flights of photons, directly affecting the transport properties of light in a resonant atomic vapor and turning this propagation into a superdiffusion process. Here, we report on a Monte Carlo simulation developed to study the evolution of the spectrum of the light in a resonant thermal vapor. We observe the gradual change of the spectrum and its convergence towards a regime of complete frequency redistribution as the number of scattering events increases. We also analyze the probability density function of the step length of photons between emissions and reabsorptions in the vapor, which governs the statistics of the light diffusion. We observe two different regimes in the light transport: superdiffusion when the vapor is excited near the line center and normal diffusion for excitation far from the line center. The regime of complete frequency redistribution is not reached for excitation far from resonance even after many absorption and reemission cycles due to correlations between emitted and absorbed frequencies.

arXiv:1506.05683•Physical Review A•May 22, 2015•14 citations

Fundamentals of nonlinear optics of atomic gases

Nikolai B. Delone, В. П. Крайнов

Linear Optics of Atomic Gases Nonlinear Interaction of Light and Atoms Nonlinear-Optics Phenomena in Atomic Gases Conclusion.

Wiley eBooks•Jan 1, 1988•51 citations

Slow and fast light propagation of quantum optical fields under the conditions of multi-photon resonances in a coherent atomic vapor

G. Romanov, Nathaniel B. Phillips, Eugeniy E. Mikhailov +1 more

Bulletin of the American Physical Society•Jun 7, 2012•0 citations

Dependence of Lévy-flight transmission on the starting point for photons propagating in atomic vapors

J. P. Lopez, A. S. M. Macedo, M. Araujo +1 more

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.

Physical Review A•Jan 3, 2023•2 citations
The propagation of light in a resonant atomic vapor can a priori be thought of as a multiple scattering process, in which each scattering event redistributes both the direction and the frequency of the photons. Particularly, the frequency redistribution may result in L\'evy flights of photons, directly affecting the transport properties of light in a resonant atomic vapor and turning this propagation into a superdiffusion process. Here, we report on a Monte Carlo simulation developed to study the evolution of the spectrum of the light in a resonant thermal vapor. We observe the gradual change of the spectrum and its convergence towards a regime of complete frequency redistribution as the number of scattering events increases. We also analyze the probability density function of the step length of photons between emissions and reabsorptions in the vapor, which governs the statistics of the light diffusion. We observe two different regimes in the light transport: superdiffusion when the vapor is excited near the line center and normal diffusion for excitation far from the line center. The regime of complete frequency redistribution is not reached for excitation far from resonance even after many absorption and reemission cycles due to correlations between emitted and absorbed frequencies.
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)P(z)P(z) for the photon step length zzz 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)P(z)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)P(z=L)P(z=L), with LLL 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.