AdS/BCFT from conformal bootstrap: construction of gravity with branes and particles

Abstract

We initiate a conformal bootstrap program to study AdS3/BCFT2 with heavy excitations. We start by solving the bootstrap equations associated with two-point functions of scalar/non-scalar primaries under the assumption that one-point functions vanish. These correspond to gravity with a brane and a non-spinning/spinning particle where the brane and the particle do not intersect with each other. From the bootstrap equations, we obtain the energy spectrum and the modified black hole threshold. We then carefully analyze the gravity duals and find the results perfectly match the BCFT analysis. In particular, brane self-intersections, which are usually considered to be problematic, are nicely avoided by the black hole formation. Despite the assumption to solve the bootstrap equations, one-point functions of scalar primaries can be non-zero in general. We construct the holographic dual for a non-vanishing one-point function, in which the heavy particle can end on the brane, by holographically computing the Rényi entropy in AdS/BCFT. As a bonus, we find a refined formula for the holographic Rényi entropy, which appears to be crucial to correctly reproduce the boundary entropy term. On the other hand, we explain why one-point functions of non-scalar primaries always vanish from the gravity dual. The non-sensitivity of the solution for the bootstrap equation to the boundary entropy helps us to construct gravity duals with negative tension branes. We also find a holographic dual of boundary primaries.

Negative Rényi entropy and brane intersection

“…We will also generalize it to allow the configurations of brane intersections or corners. Such generalization has been explored recently in [56][57][58].…”

On the dynamics in the AdS/BCFT correspondence

“…Since if we turn on masses slightly, these modes immediately disappear, it is tempting to think that these modes are somehow related to the global symmetry of the dual BCFTs. It would be particularly nice if we could identify these modes from the boundary conformal bootstrap [4,[53][54][55][56][57].…”

Entanglement phase transition in holographic pseudo entropy

“…A scalar field in AdS/BCFT was also analyzed in a probe limit by the paper [66]. There is another interesting approach to AdS/BCFT with multiple boundary conditions and brane localized matter, by introducing a corner defect on the EOW brane [67][68][69].…”