publication . Article . Other literature type . Preprint . 2008

X-ray refractive index of laser-dressed atoms

Christian Buth; Robin Santra; Robin Santra;
Open Access
  • Published: 13 Oct 2008 Journal: Physical Review A, volume 78 (issn: 1050-2947, eissn: 1094-1622, Copyright policy)
  • Publisher: American Physical Society (APS)
Abstract
We investigated the complex index of refraction in the x-ray regime of atoms in laser light. The laser (intensity up to 10^13 W/cm^2, wavelength 800nm) modifies the atomic states but, by assumption, does not excite or ionize the atoms in their electronic ground state. Using quantum electrodynamics, we devise an ab initio theory to calculate the dynamic dipole polarizability and the photoabsorption cross section, which are subsequently used to determine the real and imaginary part, respectively, of the refractive index. The interaction with the laser is treated nonperturbatively; the x-ray interaction is described in terms of a one-photon process. We numerically ...
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doi: 10.1103/physreva.78.043409
Subjects
arXiv: Physics::Atomic PhysicsPhysics::OpticsPhysics::Atomic and Molecular Clusters
free text keywords: Atomic and Molecular Physics, and Optics, Physics - Atomic Physics, Physics - Optics, Resonance, Photon energy, Ground state, Electromagnetically induced transparency, Physics, Laser, law.invention, law, Atom, Lanczos algorithm, Atomic physics, Polarizability
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