The efficient computation of transition state resonances and reaction   rates from a quantum normal form
  A quantum version of a recent formulation of transition state theory in {\em phase space} is presented. The theory developed provides an algorithm to compute quantum reaction rates and the associated Gamov-Siegert resonances with very high accuracy. The algorithm is especially efficient for multi-degree-of-freedom systems where other approaches are no longer feasible. 
Roman Schubert, Holger Waalkens, Stephen Wiggins