In AdS/CFT the membrane paradigm has been extremely important in finding
universal features of strongly coupled gauge theories. In some circumstances
we show that while there is no background horizon in the spacetime we are
studying, a horizon emerges in the open string description of probe
D-branes, thus allowing us to define an emergent, open string membrane
paradigm and study the phenomenology of gauge theories in the presence of
background fields. This simplifies greatly the calculation of certain
transport properties which would otherwise need ugly numerical methods for
their study.
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