The Unruh effect and its applications

@article{Crispino2008TheUE,
  title={The Unruh effect and its applications},
  author={Lu{\'i}s C. B. Crispino and Atsushi Higuchi and George Matsas},
  journal={Reviews of Modern Physics},
  year={2008},
  volume={80},
  pages={787-838}
}
It has been 30 years since the discovery of the Unruh effect. It has played a crucial role in our understanding that the particle content of a field theory is observer dependent. This effect is important in its own right and as a way to understand the phenomenon of particle emission from black holes and cosmological horizons. The Unruh effect is reviewed here with particular emphasis on its applications. A number of recent developments are also commented on and some controversies are discussed… 
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