 2016

Source paper: www.whatdotheyknow.com/request/physics_past_exam_papers_2015_16/response/973997/attach/3/Cowell%20Attachment.zip?cookie_passthrough=1

All eight questions are solved. Set $\hslash =c=1$ unless a thermal factor $k_B$ is written explicitly. Relativistic calculations use the Minkowski metric $(+---)$. The unbracketed sums in the first two printed energies are read as sums over all the displayed bond terms, with the common prefactor applying to the entire summand.