Gauge/gravity duality can be used to study QCD at high densities and low
temperatures where analysis by using other tools is challenging and
uncertainties are therefore large. Combining predictions from
gauge/gravity duality with state-of-the-art models of nuclear matter
leads to a family of feasible "hybrid" equations of state for cold QCD
matter. Using such equations of state, we simulate the merger of binary
neutron stars and analyze the spectral properties of their gravitational
waveforms. Characteristic frequencies in the spectrum produced are
shifted to significantly lower values as compared to predictions from
models with pure nuclear matter.