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Self-force on an electric dipole in the spacetime of a cosmic string
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Self-force on an electric dipole in the spacetime of a cosmic string
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We calculate the electrostatic self-force on an electric dipole in the spacetime generated by a static, thin, infinite and straight cosmic string. The electric dipole is held fixed in different configurations, namely, parallel, perpendicular to the cosmic string and oriented along the azimuthal direction around this topological defect, which is stretched along the z axis. We show that the self-force is equivalent to an interaction of the electric dipole with an effective dipole moment which depends on the linear mass density of the cosmic string and on the configuration. The plots of the self-forces as functions of the parameter which determines the angular deficit of the cosmic string are shown for those different configurations.
Forward citations
Cited by 2 Pith papers
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Self-Forces as Nonlocal Probes of Gravastar Interiors
For charges held near a gravastar, the self-force carries information about the interior, giving explicitly computable differences from the black-hole case.
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Self-Forces as Nonlocal Probes of Gravastar Interiors
Static scalar and electric charges near a thin-shell gravastar experience self-forces different from those near a black hole, with analytic leading-order formulas.
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