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Exact electrodynamics versus standard optics for a slab of cold dense gas

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Exact electrodynamics versus standard optics for a slab of cold dense gas. / Javanainen, Juha; Ruostekoski, Janne; Li, Yi et al.
In: Physical review a, Vol. 96, No. 9, 033835, 20.09.2017.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Javanainen, J, Ruostekoski, J, Li, Y & Yoo, S-M 2017, 'Exact electrodynamics versus standard optics for a slab of cold dense gas', Physical review a, vol. 96, no. 9, 033835. https://doi.org/10.1103/PhysRevA.96.033835

APA

Javanainen, J., Ruostekoski, J., Li, Y., & Yoo, S-M. (2017). Exact electrodynamics versus standard optics for a slab of cold dense gas. Physical review a, 96(9), Article 033835. https://doi.org/10.1103/PhysRevA.96.033835

Vancouver

Javanainen J, Ruostekoski J, Li Y, Yoo S-M. Exact electrodynamics versus standard optics for a slab of cold dense gas. Physical review a. 2017 Sept 20;96(9):033835. doi: 10.1103/PhysRevA.96.033835

Author

Javanainen, Juha ; Ruostekoski, Janne ; Li, Yi et al. / Exact electrodynamics versus standard optics for a slab of cold dense gas. In: Physical review a. 2017 ; Vol. 96, No. 9.

Bibtex

@article{bfe7e39b0e464362b22e403d079b66f6,
title = "Exact electrodynamics versus standard optics for a slab of cold dense gas",
abstract = "We study light propagation through a slab of cold gas using both the standard electrodynamics of polarizable media, and massive atom-by-atom simulations of the electrodynamics. The main finding is that the predictions from the two methods may differ qualitatively when the density of the atomic sample $ and the wavenumber of resonant light $k$ satisfy $rho k^-3gtrsim 1$. The reason is that the standard electrodynamics is a mean-field theory, whereas for sufficiently strong light-mediated dipole-dipole interactions the atomic sample becomes correlated. The deviations from mean-field theory appear to scale with the parameter $rho k^-3$, and we demonstrate noticeable effects already at $rho k^-3 simeq 10^-2$. In dilute gases and in gases with an added inhomogeneous broadening the simulations show shifts of the resonance lines in qualitative agreement with the predicted Lorentz-Lorenz shift and {"}cooperative Lamb shift{"}, but the quantitative agreement is unsatisfactory. Our interpretation is that the microscopic basis for the local-field corrections in electrodynamics is not fully understood.",
keywords = "physics.optics, physics.atom-ph",
author = "Juha Javanainen and Janne Ruostekoski and Yi Li and Sung-Mi Yoo",
note = "{\textcopyright} 2017 American Physical Society",
year = "2017",
month = sep,
day = "20",
doi = "10.1103/PhysRevA.96.033835",
language = "English",
volume = "96",
journal = "Physical review a",
issn = "1050-2947",
publisher = "American Physical Society",
number = "9",

}

RIS

TY - JOUR

T1 - Exact electrodynamics versus standard optics for a slab of cold dense gas

AU - Javanainen, Juha

AU - Ruostekoski, Janne

AU - Li, Yi

AU - Yoo, Sung-Mi

N1 - © 2017 American Physical Society

PY - 2017/9/20

Y1 - 2017/9/20

N2 - We study light propagation through a slab of cold gas using both the standard electrodynamics of polarizable media, and massive atom-by-atom simulations of the electrodynamics. The main finding is that the predictions from the two methods may differ qualitatively when the density of the atomic sample $ and the wavenumber of resonant light $k$ satisfy $rho k^-3gtrsim 1$. The reason is that the standard electrodynamics is a mean-field theory, whereas for sufficiently strong light-mediated dipole-dipole interactions the atomic sample becomes correlated. The deviations from mean-field theory appear to scale with the parameter $rho k^-3$, and we demonstrate noticeable effects already at $rho k^-3 simeq 10^-2$. In dilute gases and in gases with an added inhomogeneous broadening the simulations show shifts of the resonance lines in qualitative agreement with the predicted Lorentz-Lorenz shift and "cooperative Lamb shift", but the quantitative agreement is unsatisfactory. Our interpretation is that the microscopic basis for the local-field corrections in electrodynamics is not fully understood.

AB - We study light propagation through a slab of cold gas using both the standard electrodynamics of polarizable media, and massive atom-by-atom simulations of the electrodynamics. The main finding is that the predictions from the two methods may differ qualitatively when the density of the atomic sample $ and the wavenumber of resonant light $k$ satisfy $rho k^-3gtrsim 1$. The reason is that the standard electrodynamics is a mean-field theory, whereas for sufficiently strong light-mediated dipole-dipole interactions the atomic sample becomes correlated. The deviations from mean-field theory appear to scale with the parameter $rho k^-3$, and we demonstrate noticeable effects already at $rho k^-3 simeq 10^-2$. In dilute gases and in gases with an added inhomogeneous broadening the simulations show shifts of the resonance lines in qualitative agreement with the predicted Lorentz-Lorenz shift and "cooperative Lamb shift", but the quantitative agreement is unsatisfactory. Our interpretation is that the microscopic basis for the local-field corrections in electrodynamics is not fully understood.

KW - physics.optics, physics.atom-ph

U2 - 10.1103/PhysRevA.96.033835

DO - 10.1103/PhysRevA.96.033835

M3 - Journal article

VL - 96

JO - Physical review a

JF - Physical review a

SN - 1050-2947

IS - 9

M1 - 033835

ER -