Testing one-body density functionals on a solvable model
  There are several physically motivated density matrix functionals in the literature, built from the knowledge of the natural orbitals and the occupation numbers of the one-body reduced density matrix. With the help of the equivalent phase-space formalism, we thoroughly test some of the most popular of those functionals on a completely solvable model. 
Carlos L. Benavides-Riveros and Joseph C. V\'arilly
physics.chem-ph quant-ph