Conformal field theories have been long known to describe the fascinating universal physics
of scale invariant critical points. They describe continuous phase transitions in fluids …

These notes are from courses given at TASI and the Advanced Strings School in summer
2015. Starting from principles of quantum field theory and the assumption of a traceless …

A bstract We rewrite the Chern-Simons description of pure gravity on global AdS 3 and on
Euclidean BTZ black holes as a quantum field theory on the AdS boundary. The resulting …

The eigenstate thermalization hypothesis (ETH) posits that the reduced density matrix for a
subsystem corresponding to an excited eigenstate is “thermal.” Here we expound on this …

The discussions in § 2 and § 3 make it rather clear that while we have to evaluate a
sequence of functional integrals to compute the Rényi entropies, these are rather complex …

A bstract We develop a new method for decomposing Witten diagrams into conformal
blocks. The steps involved are elementary, requiring no explicit integration, and operate …

A bstract Causality places nontrivial constraints on QFT in Lorentzian signature, for example
fixing the signs of certain terms in the low energy Lagrangian. In d dimensional conformal …

A bstract Recent progress in AdS/CFT has provided a good understanding of how the bulk
spacetime is encoded in the entanglement structure of the boundary CFT. However, little is …

A bstract We compute the Krylov Complexity of a light operator\(\mathcal {O}\) L in an
eigenstate of a 2d CFT at large central charge c. The eigenstate corresponds to a primary …

A bstract We study aspects of Jackiw-Teitelboim (JT) quantum gravity in two-dimensional
nearly de Sitter (dS) spacetime, as well as pure de Sitter quantum gravity in three …