A comparison of superradiance and negative-phase-velocity phenomenons in the ergosphere of a rotating black hole

Abstract

The propagation of electromagnetic plane waves with negative phase velocity (NPV) in the ergosphere of a rotating black hole has recently been reported. A comparison of NPV propagation and superradiance is presented. We show that, although both phenomenons involve negative energy densities, there are two significant differences between them.

Figure 2 in the version published in Phys Lett A is corrected in the arxiv version

References in corpus (2)

• Gravitation and Electromagnetic Wave Propagation with Negative Phase Velocity
• Global and local perspectives of gravitationally assisted negative-phase-velocity propagation of electromagnetic waves in vacuum

Cited by in corpus (4)

• General Relativity in Electrical Engineering
• Passage of radiation through wormholes of arbitrary shape
• Electromagnetic waves with negative phase velocity in Schwarzschild-de Sitter spacetime
• A Plethora of Negative-Refraction Phenomenons in Relativistic and Non-Relativistic Scenarios