Volume 81, Number 2, January 2008
|Number of page(s)||5|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||07 December 2007|
Correlation of diffusing photons and level crossing spectroscopy
Department of Physics, Technion Israel Institute of Technology - 32000 Haifa, Israel
Accepted: 16 November 2007
We show that an enhanced intensity correlation shows up in the diffusion of photons multiply scattered by an atomic gas of large optical depth b. This enhancement occurs only for scattering atoms that are Zeeman degenerate and it leads to a deviation from the Rayleigh law. The fluctuations measured by their variance, display a resonance peak as a function of an applied magnetic field. The resonance width is proportional to the small factor . We derive closed analytic expressions for all these physical quantities which are directly accessible experimentally.
PACS: 42.50.Fx – Cooperative phenomena in quantum optical systems / 42.25.Dd – Wave propagation in random media / 71.27.+a – Strongly correlated electron systems; heavy fermions
© EPLA, 2008
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