Holography for Boundary Lifshitz Field Theory

TL;DR

This paper develops a holographic duality for boundary Lifshitz field theories, defining boundary conditions on the end of the world brane, and verifies entanglement entropy matches between field theory and holographic calculations.

Contribution

It introduces a holographic dual for boundary Lifshitz field theories with boundary conditions and derives a $g$-theorem, connecting boundary conditions with entanglement entropy results.

Findings

Holographic duality for boundary Lifshitz field theories established.

Derived $g$-theorem for the proposed holographic models.

Entanglement entropy calculations match between field theory and holography.

Abstract

We propose a holographic duality for the boundary Lifshitz field theory (BLFT). Similar to holographic BCFT, holographic BLFT can be consistently defined by imposing either a Neumann boundary condition (NBC) or a conformal boundary condition (CBC) on the end of the world (EOW) brane. We propose $g$-functions and derive $g$-theorem for these two types of holographic BLFT. On the field theory side, we consider BLFT whose path integral is prescribed to include also paths bouncing off the boundary. The entanglement entropy for an interval for the Lifshitz invariant ground state is computed in the saddle point approximation, and is found to agree precisely with the holographic result in both limits when the interval is very close or very far away from the boundary.