Comment on superluminality in general relativity

Abstract

General relativity provides an appropriate framework for addressing the issue of sub- or superluminality as an apparent effect. Even though a massless particle travels on the light cone, its average velocity over a finite path measured by different observers is not necessarily equal to the velocity of light, as a consequence of the time dilation or contraction in gravitational fields. This phenomenon occurs in either direction (increase or depletion) irrespectively of the details and strength of the gravitational interaction. Hence, it does not intrinsically guarantee superluminality, even when the gravitational field is reinforced.

6 pages

References in corpus (4)

• Measurement of the neutrino velocity with the OPERA detector in the CNGS beam
• Some light on "Measurement of the neutrino velocity with the OPERA detector in the CNGS beam"
• Superluminal neutrinos and extra dimensions: constraints from the null energy condition
• Relativistic Superluminal Neutrinos

Cited by in corpus (8)

• Modified Dispersion Relation, Photon's Velocity, and Unruh Effect
• Constraints from orbital motions around the Earth of the environmental fifth-force hypothesis for the OPERA superluminal neutrino phenomenology
• Superluminal neutrinos and domain walls
• Superluminal Neutrinos and Monopoles
• The Price of Neutrino Superluminality continues to rise
• Relativistic positioning systems: Perspectives and prospects
• Subluminal OPERA Neutrinos
• Common origin of superluminal neutrinos and DAMA annual modulation