Matrix elements of one-body and two-body operators between arbitrary HFB multi-quasiparticle states
Qing-Li Hu, Zao-Chun Gao, Y.S. Chen
We present new formulae for the matrix elements of one-body and two-body physical operators, which are applicable to arbitrary Hartree–Fock–Bogoliubov wave functions, including those for multi-quasiparticle excitations. The testing calculations show that our formulae may substantially reduce the computational time by several orders of magnitude when applied to many-body quantum system in a large Fock space.
arXiv:1307.6905•Physics Letters B•May 22, 2014•35 citations