Rotation of Linear Polarization Plane and Circular Polarization from Cosmological Pseudo-Scalar Fields
Feb, 2008
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Abstract: (arXiv)
We show that a time evolving pseudo-scalar field coupled to the electromagnetic tensor generates circular polarization and does not only rotate the plane of linear polarization. We compute analytically and numerically the propagation of the Stokes parameters from the last scattering surface for an oscillating and a monotonic decreasing pseudo-scalar field acting as dark matter.- polarization: linear
- rotation
- numerical calculations
- electromagnetic field
- field theory: scalar
- Boltzmann equation
- space-time: Robertson-Walker
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