Uniformly accelerating observer in $κ$-deformed space-time

Abstract

In this paper, we study the effect of $κ$-deformation of the space-time on the response function of a uniformly accelerating detector coupled to a scalar field. Starting with $κ$-deformed Klein-Gordon theory, which is invariant under a $κ$-Poincaré algebra and written in commutative space-time, we derive $κ$-deformed Wightman functions, valid up to second order in the deformation parameter $a$. Using this, we show that the first non-vanishing correction to the Unruh thermal distribution is only in the second order in $a$. We also discuss various other possible sources of $a$-dependent corrections to this thermal distribution.

12 pages, minor changes, to appear in Phys. Rev. D