The low-temperature behavior of the quark-meson model

Understand

We revisit the phase diagram of strong-interaction matter for the two-flavor quark-meson model using the Functional Renormalization Group.

• In contrast to standard mean-field calculations, an unusual phase structure is encountered at low temperatures and large quark chemical potentials.
• In particular, we identify a regime where the pressure decreases with increasing temperature and discuss possible reasons for this unphysical behavior.