Quantum effects in warp drives
Stefano Finazzi
- Vol. 58, pp 01010
TLDR
In this paper, it was shown that superluminal warp drives remain unstable even if the Lorentz symmetry is broken by the introduction of regulating higher order terms in the Lagrangian of the quantum field.Abstract:
Warp drives are interesting configurations that, at least theoretically, provide a way to travel at superluminal speed. Unfortunately, several issues seem to forbid their realization. First, a huge amount of exotic matter is required to build them. Second, the presence of quantum fields propagating in superluminal warp-drive geometries makes them semiclassically unstable. Indeed, a Hawking-like high-temperature flux of particles is generated inside the warp-drive bubble, which causes an exponential growth of the energy density measured at the front wall of the bubble by freely falling observers. Moreover, superluminal warp drives remain unstable even if the Lorentz symmetry is broken by the introduction of regulating higher order terms in the Lagrangian of the quantum field. If the dispersion relation of the quantum field is subluminal, a black-hole laser phenomenon yields an exponential amplification of the emitted flux. If it is superluminal, infrared effects cause a linear growth of this flux.read more
References
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Book
Quantum Fields in Curved Space
N. D. Birrell,Paul Davies +1 more
TL;DR: A comprehensive review of the subject of gravitational effects in quantum field theory can be found in this paper, where special emphasis is given to the Hawking black hole evaporation effect, and to particle creation processes in the early universe.
Quantum Fields in Curved Space
N. D. Birrell,Paul Davies +1 more
TL;DR: A comprehensive review of the subject of gravitational effects in quantum field theory can be found in this paper, where special emphasis is given to the Hawking black hole evaporation effect, and to particle creation processes in the early universe.
Journal ArticleDOI
Quantum Gravity at a Lifshitz Point
TL;DR: In this article, a quantum field theory of gravity with dynamical critical exponent equal to $z = 3$ in the UV is presented. But this theory is restricted to satisfy the condition of detailed balance.
Journal ArticleDOI
Nonstandard optics from quantum space-time
Rodolfo Gambini,Jorge Pullin +1 more
TL;DR: In this paper, light propagation in the picture of semiclassical space-time that emerges in canonical quantum gravity in the loop representation is studied, and it is shown that under certain circumstances nonvanishing corrections appear that depend on the helicity of propagating waves.
Journal ArticleDOI
Gravity with a dynamical preferred frame
Ted Jacobson,David Mattingly +1 more
TL;DR: In this article, a general covariant model of the aether was studied, in which local Lorentz invariance is broken by a dynamical unit timelike vector field.