Glueballs on S^3
  For SU(2) gauge theory on the three-sphere we study the dynamics of the low-energy modes. By explicitely integrating out the high-energy modes, the one-loop correction to the hamiltonian for this problem is obtained. After imposing the $\theta$-dependence through boundary conditions in configuration space, we obtain the glueball spectrum of the effective theory with a variational method. 
Bas van den Heuvel