# Velocity of Sound beyond the High-Density Relativistic Limit from Lattice Simulation of Dense Two-Color QCD

@inproceedings{Iida2022VelocityOS, title={Velocity of Sound beyond the High-Density Relativistic Limit from Lattice Simulation of Dense Two-Color QCD}, author={Kei Iida and Etsuko Itou}, year={2022} }

We obtain the equation of state (EoS) for two-color QCD at low temperature and high density from the lattice Monte Carlo simulation. We ﬁnd that the velocity of sound exceeds the relativistic limit ( c 2 s /c 2 = 1 / 3) after BEC-BCS crossover in the superﬂuid phase. Such an excess of the sound velocity is predicted by several eﬀective theories but is previously unknown from any lattice calculations for QCD-like theories. This ﬁnding might have a possible relevance to the EoS of neutron star…

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