  Motivated by the possible presence of deconfined quark matter in neutron
stars and their mergers and the important role of transport phenomena in these
systems, we perform the first-ever systematic study of different viscosities
and conductivities of dense quark matter using the gauge/gravity duality.
Utilizing the V-QCD model, we arrive at results that are in qualitative
disagreement with the predictions of perturbation theory, which highlights the
differing transport properties of the system at weak and strong coupling and
calls for caution in the use of the perturbative results in neutron-star
applications.
