These lectures give an introduction to the quantum physics of black holes, including recent
developments based on quantum information theory such as the firewall paradox and its …

Aiming at nonexperts, the key mechanisms of higher-spin extensions of ordinary gravities in
four dimensions and higher are explained. An overview of various no-go theorems for low …

A bstract We consider several aspects of unitary higher-dimensional conformal field theories
(CFTs). We first study massive deformations that trigger a flow to a gapped phase. Deep …

Higher Spin Gravity refers to extensions of gravity including at least one field of spin greater
than two. These extensions are expected to provide manageable models of quantum gravity …

A bstract Unitary, Lorentz-invariant quantum field theories in flat spacetime obey mi-
crocausality: commutators vanish at spacelike separation. For interacting theories in more …

We study the constraints imposed by the existence of a single higher spin conserved current
on a three-dimensional conformal field theory (CFT). A single higher spin conserved current …

We consider the most general three point function for gravitational waves produced during a
period of exactly de Sitter expansion. The de Sitter isometries constrain the possible shapes …

We study three-dimensional conformal field theories described by U (N) Chern–Simons
theory at level k coupled to massless fermions in the fundamental representation. By solving …

We propose a duality between the 2d WN minimal models in the large N't Hooft limit, and a
family of higher spin theories on AdS 3. The 2d conformal field theories (CFTs) can be …

We conjecture that Vasiliev's theory of higher spin gravity in four-dimensional de Sitter space
(dS 4) is holographically dual to a three-dimensional conformal field theory (CFT 3) living on …