Efficient and systematic calculation of arbitrary observables for the
matrix product state excitation ansatz
Efficient and systematic calculation of arbitrary observables for the
matrix product state excitation ansatz
Numerical methods based on matrix product states (MPSs) are currently the de facto standard for calculating the ground state properties of (quasi-)one-dimensional quantum many-body systems. While the properties of the low-lying excitations in such systems are often studied in this MPS framework through _dynamics_ by means of time-evolution simulations, we …