Ising and Gross-Neveu model in next-to-leading order

Understand

We study scalar and chiral fermionic models in next-to-leading order with the help of the functional renormalisation group.

• Their critical behaviour is of special interest in condensed matter systems, in particular graphene.
• To derive the beta functions, we make extensive use of computer algebra.
• The resulting flow equations were solved with pseudo-spectral methods to guarantee high accuracy.