# Seeing bulk perturbations in Lifshitz holography

## TL;DR

This paper studies how bulk perturbations in Lifshitz holography affect boundary observables, revealing suppression of spectral weight at low frequencies and partial IR invisibility of bulk effects.

## Contribution

It introduces a method to analyze linearized bulk perturbations in Lifshitz spacetime and computes the resulting holographic Green's function.

## Key findings

- Spectral weight is suppressed at low frequencies in Lifshitz Green's functions.
- Bulk IR perturbations can be partially hidden from boundary probes.
- The approach provides insights into IR physics in Lifshitz holography.

## Abstract

We introduce a perturbation $h_{\mu\nu}$ onto a background Lifshitz spacetime and examine some of its consequences. In particular, we consider a radially localized perturbation and compute the resulting holographic Green's function to linearized order. At leading order, the Lifshitz Green's function demonstrates suppression of spectral weight at low frequencies, and this feature allows bulk perturbations in the IR to be partially hidden from local boundary probes.