  The gauge-gravity duality and analog gravity both relate a condensed matter
system to a gravitational theory. This makes it possible to use gravity as an
intermediary to establish a relation between two different condensed matter
systems: The strongly coupled system from the gauge-gravity duality and the
weakly coupled gravitational analog.We here offer some examples for relations
between observables in the two different condensed matter systems. In
particular, we show that in some cases Green's functions and first order
transport coefficients in holographic models are of the same form as those in
an analog gravitational system, which allows in principle to obtain the former
by measuring the latter.
