Stiff equation of state for a holographic nuclear matter as instanton gas

Understand

In a holographic model, which was used to investigate the color superconducting phase of QCD, a dilute gas of instantons is introduced to study the nuclear matter.

• The free energy of the nuclear matter is computed as a function of the baryon chemical potential in the probe approximation.
• Then the equation of state is obtained at low temperature.
• Using the equation of state for the nuclear matter, the Tolman-Oppenheimer-Volkov equations for a cold compact star are solved.