The Gibbons–Hawking–York (GHY) boundary term makes the Dirichlet problem for gravity
well-defined, but no such general term seems to be known for Neumann boundary …

A bstract We do a systematic study of the phases of gravity coupled to an electromagnetic
field and charged scalar in flat space, with box boundary conditions. The scalar-less box has …

The recently proposed holography-inspired approach to quantum gravity is reviewed and
expanded. The approach is based on the foliation of the background spacetime and …

Gravitational physics is arguably better understood in the presence of a negative
cosmological constant than a positive one, yet there exist strong technical similarities …

In recent decades, the European energy sector is transforming due to the growing demand
for electricity and increased requirements for ensuring the continuity of supply. In the …

We write down a Robin boundary term for general relativity. The construction relies on the
Neumann result of arxiv: 1605.01603 in an essential way. This is unlike in mechanics and …

A bstract We derive a general formula for renormalized entanglement entropy in even-
dimensional CFTs holographically dual to Einstein gravity in one dimension higher. In order …

A bstract We discuss various aspects of HKLL bulk reconstruction for the free scalar field in
AdS d+ 1. First, we consider the spacelike reconstruction kernel for the non-normalizable …

In AdS/CFT, the non-uniqueness of the reconstructed bulk from boundary subregions has
motivated the notion of code subspaces. We present some closely related structures that …

We argue that a natural boundary condition for gravity in asymptotically anti–de Sitter (AdS)
spaces is to hold the renormalized boundary stress tensor density fixed, instead of the …