The Unruh effect and its applications

Understand

It has been thirty 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.
• Here, we review the Unruh effect with particular emphasis to its applications.