Particle creation via high frequency dispersion

Details Particle creation via high frequency dispersion Particle creation via high frequency dispersion

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997phrvd..55.6155c&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 55, Issue 10, 15 May 1997, pp.6155-6161

Physics

12

Quantum Aspects Of Black Holes, Evaporation, Thermodynamics, Lower Dimensional Models, Minisuperspace Models, Quantum Field Theory In Curved Spacetime

Scientific paper

We investigate the particle creation caused by a nonlinear dispersion relation for a massless scalar field propagating on a background curved spacetime in two dimensions. The dispersion relation adopted agrees with the standard dispersion relation at long wavelengths but is modified at short wavelengths, the division being characterized by a new length scale 1/k0. We consider both spacetimes with and without a black hole. Those without contain instead a uniformly moving ``bump.'' The black hole cases considered have Hawking temperatures TH>k0/100. We find that the particle creation arises in all cases from two effects: scattering and mode conversion. The latter was identified by Corley and Jacobson as the phenomenon responsible for the Hawking effect.

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