A comparison of superradiance and negative-phase-velocity phenomenons in the ergosphere of a rotating black hole
classification
🌌 astro-ph
gr-qchep-th
keywords
blackcomparisonergosphereholenegativephenomenonspropagationrotating
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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.
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