Emergent Horizons and Causal Structures in Holography

Understand

The open string metric arises kinematically in studying fluctuations of open string degrees of freedom on a D-brane.

• An observer, living on a probe D-brane, can send signals through the spacetime by using such fluctuations on the probe, that propagate in accordance with a metric which is conformal to the open string metric.
• Event horizons can emerge in the open string metric when one considers a D-brane with an electric field on its worldvolume.
• Here, we emphasize the role of and investigate, in details, the causal structure of the resulting open string event horizon and demonstrate, among other things, its close similarities to an usual black hole event horizon in asymptotically AdS-spaces.