The discovery in the early 1970s that black holes radiate as black bodies has radically
affected our understanding of general relativity, and offered us some early hints about the …

A bstract Gravitational wave 'echoes' during black-hole merging events have been
advocated as possible signals of modifications to gravity in the strong-field (but …

Black holes behave as thermodynamic objects, and it is natural to ask for an underlying"
statistical mechanical" explanation in terms of microscopic degrees of freedom. I summarize …

The thermodynamics of “horizon brightened acceleration radiation”(HBAR), due to a random
atomic cloud freely falling into a black hole in a Boulware-like vacuum, is shown to mimic the …

A quantum-optics approach is used to study the nature of the acceleration radiation due to a
random atomic cloud falling freely into a generalized Schwarzschild black hole through a …

A bstract We show that the simplest FLRW cosmological system consisting in the homo-
geneous and isotropic massless Einstein-Scalar system enjoys a hidden conformal …

A two-level atom freely falling towards a Schwarzschild black hole was recently shown to
detect radiation in the Boulware vacuum in an insightful paper [MO Scully et al., Proc. Natl …

An atom falling freely into a Kerr black hole in a Boulware-like vacuum is shown to emit
radiation with a Planck spectrum at the Hawking temperature. For a cloud of falling atoms …

We have known for more than 30 years that black holes behave as thermodynamic systems,
radiating as black bodies with characteristic temperatures and entropies. This behavior is …

A static observer with a finite lifetime has causal access to only a limited region of spacetime
known as the causal diamond. The presence of an apparent horizon in the causal diamond …