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Discrete Black-Hole Radiation and the Information Loss Paradox
Shahar Hod
Hawking's black hole information puzzle highlights the incompatibility between our present understanding of gravity and quantum physics. However, Hawking's prediction of black-hole…
Cosmic Censorship: The Role of Quantum Gravity
Shahar Hod, Tsvi Piran
The cosmic censorship hypothesis introduced by Penrose thirty years ago is still one of the most important open questions in {\it classical} general relativity. In this essay we pu…
Wave Propagation in Nontrivial Backgrounds
Shahar Hod
It is well known that waves propagating in a nontrivial medium develop ``tails''. However, the exact form of the late-time tail has so far been determined only for a narrow class o…
Black-hole radiation, the fundamental area unit, and the spectrum of particle species
Shahar Hod
Bekenstein and Mukhanov have put forward the idea that, in a quantum theory of gravity a black hole should have a discrete mass spectrum with a concomitant {\it discrete} line emis…
Evidence for a null entropy of extremal black holes
Shahar Hod
We present some arguments in support of a {\it zero} entropy for {\it extremal} black holes. These rely on a combination of both quantum, thermodynamic, and statistical physics arg…
Gravitation, the Quantum, and Bohr's Correspondence Principle
Shahar Hod
The black hole combines in some sense both the ``hydrogen atom'' and the ``black-body radiation'' problems of quantum gravity. This analogy suggests that black-hole quantization ma…