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physics.chem-ph2011
Quantum Monte Carlo facing the Hartree-Fock symmetry dilemma: The case of hydrogen rings
Peter Reinhardt, Julien Toulouse, Roland Assaraf +2
When using Hartree-Fock (HF) trial wave functions in quantum Monte Carlo calculations, one faces, in case of HF instabilities, the HF symmetry dilemma in choosing between the symme…
physics.chem-ph2010
Quantum Monte Carlo calculations of electronic excitation energies: the case of the singlet (CO) transition in acrolein
Julien Toulouse, Michel Caffarel, Peter Reinhardt +2
We report state-of-the-art quantum Monte Carlo calculations of the singlet (CO) vertical excitation energy in the acrolein molecule, extending the recent study of Bouab…