Speaker
Etsuko Itou
(iTHEMS, RIKEN)
Description
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 (cs2/c2=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 possible relevance to the EoS of neutron star matter revealed by recent measurements of neutron star masses and radii.
| speaker affiliation | RIKEN |
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Primary author
Etsuko Itou
(iTHEMS, RIKEN)
Co-author
Kei Iida
(Kochi University)
