[ALPS-users] Can the mps_optim calculate the entanglement spectrum of the lattice with two cuts ?

Dear all, Can the mps_optim calculate the entanglement spectrum of the lattice with two cut ? For instance, the lattice is separated to A B C, how to calculate the -Ln(\rho_B), \rho_B=Tr_{A,C} |\Phi><\Phi|. Thanks, Xiaofan Zhou