25 citations · 92 across the 20 of their papers we have counts for
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Spin Hall effect of light in inhomogeneous axion field
Mansoureh Hoseini, Mohammad Mehrafarin
We study the spin transport of light in weakly inhomogeneous axion field in a flat Robertson-Walker universe and derive the spin Hall effect for circularly polarized rays. Regardin…
Cosmological Birefringence and the Geometric Phase of Photons
Mansoureh Hoseini, Mohammad Mehrafarin
Regarding axion electrodynamics in the background flat FRW universe, we show that cosmological birefringence arises from an adiabatic noncyclic geometric phase that appears in the…
Berry phase of primordial scalar and tensor perturbations in single-field inflationary models
Hamideh Balajani, Mohammad Mehrafarin
In the framework of the single-field slow-roll inflation, we derive the Hamiltonian of the linear primordial scalar and tensor perturbations in the form of time-dependent harmonic…
One-loop approximation of Moller scattering in Krein-space quantization
F. Payandeh, M. Mehrafarin, M. V. Takook
It has been shown that the negative-norm states necessarily appear in a covariant quantization of the free minimally coupled scalar field in de Sitter spacetime [1,2]. In this proc…
A phase transition model for metric fluctuations in vacuum
M. Mehrafarin
Regarding metric fluctuations as generating {\it roughness} on the fabric of the otherwise smooth vacuum, it is shown that in its simplest form, the effect can be described by the…