2 research outputs found
An analog fluid model for some tachyonic effects in field theory
We consider the sound radiation from an acoustic point-like source moving
along a supersonic ("space-like") trajectory in a fluid at rest. We call it an
acoustic "tachyonic" source. We describe the radiation emitted by this
supersonic source. After quantizing the acoustic perturbations, we present the
distribution of phonons generated by this classical tachyonic source and the
classical wave interference pattern.Comment: 14 pages, 5 figures, accepted for publication in Mod. Phys. Lett.
Accelerated detectors in Dirac vacuum: the effects of horizon fluctuations
We consider an Unruh-DeWitt detector interacting with a massless Dirac field.
Assuming that the detector is moving along an hyperbolic trajectory, we modeled
the effects of fluctuations in the event horizon using a Dirac equation with
random coefficients. First, we develop the perturbation theory for the
fermionic field in a random media. Further we evaluate corrections due to the
randomness in the response function associated to different model detectors.Comment: 19 pages, 1 figur