Spin-adapted Matrix Product States and Operators
arXiv:1602.01145 · doi:10.1063/1.4944921
Abstract
Matrix product states (MPSs) and matrix product operators (MPOs) allow an alternative formulation of the density matrix renormalization group algorithm introduced by White. Here, we describe how non-abelian spin symmetry can be exploited in MPSs and MPOs by virtue of the Wigner--Eckart theorem at the example of the spin-adapted quantum chemical Hamiltonian operator.
10 pages, 1 table