Dispersive photon propagation in semiclassical higher-derivative gravity

作者：Accioly Antonio^*; Helayel Neto Jose; Barone F E; Giacchini Breno; Herdy Wallace

来源：Modern Physics Letters A, 2015, 30(11): 1550052.

DOI：10.1142/S0217732315500522

• Semiclassical higher-derivative gravity
• dispersive photon propagation
• bound on the vertical bar beta vertical bar-constant

The scattering of a photon by a weak external gravitational field which is solution of the linearized higher-derivative gravity equations sourced by a point-like massive particle located at the origin of the coordinate system, is analyzed. It is shown that the R-mu nu(2)-sector of the theory produces dispersive photon propagation. Subsequently, the angle vertical bar Delta theta vertical bar (equivalent to vertical bar theta(violet) - theta(red)vertical bar) at which the visible spectrum would be spread over in the case of a photon passing by the Sun is plotted as a function of the vertical bar beta vertical bar-constant related to the R-mu nu(2)-sector. An upper bound on vertical bar beta vertical bar is then found. Interestingly enough, this limit is thirteen orders of magnitude below the accepted upper bound on vertical bar beta vertical bar.

• 出版日期2015-4-10