Penrose Limits, Worldvolume Fluxes and Supersymmetry

TL;DR

The paper investigates the conditions under which Penrose limits exist for brane probes with worldvolume fluxes and finds that when they do, supersymmetry preservation is unaffected, linking to the infinite-tension limit concept.

Contribution

It clarifies the relationship between Penrose limits, worldvolume fluxes, and supersymmetry preservation, highlighting cases where the limit exists and its implications.

Findings

Finite Penrose limits for fluxed branes are rare

Supersymmetry is preserved when the limit exists

Penrose limit relates to the infinite-tension limit

Abstract

It is noted that a finite Penrose limit for brane probes with non-zero worldvolume fluxes does not generically exist; this is closely related to the observation by Blau et al that for a brane probe the Penrose limit is equivalent to an infinite-tension limit. It is shown that when the limit exists, however, the number of supersymmetries preserved by the probe does not decrease.