This is a collection of my lecture notes on the higher-spin theory course given for students at
the Institute for Theoretical and Mathematical Physics, Lomonosov Moscow State University …

A bstract We describe in more detail the general relation uncovered in our previous work
between boundary correlators in de Sitter (dS) and in Euclidean anti-de Sitter (EAdS) space …

A bstract We develop a Mellin space approach to boundary correlation functions in anti-de
Sitter (AdS) and de Sitter (dS) spaces. Using the Mellin-Barnes representation of correlators …

A bstract We propose a Mellin space approach to the evaluation of late-time momentum-
space correlation functions of quantum fields in (d+ 1)-dimensional de Sitter space. The …

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 Motivated by the prospect of constraining microscopic models, we calculate the
exact one-loop corrected de Sitter entropy (the logarithm of the sphere partition function) for …

A bstract Large N melonic theories are characterized by two-point function Feynman
diagrams built exclusively out of melons. This leads to conformal invariance at strong …

We revisit the problem of interactions of higher-spin fields in flat space. We argue that all no-
go theorems can be avoided by the light-cone approach, which results in more interaction …

A bstract We explicitly rewrite the path integral for the free or critical O (N)(or U (N)) bosonic
vector models in d space-time dimensions as a path integral over fields (including massless …

This review is an elaboration of recent results on the holographic re-construction of metric-
like interactions in higher-spin gauge theories on anti-de Sitter space (AdS), employing their …