Extracting Quantum Many-Body Scarred Eigenstates with Matrix Product States
Extracting Quantum Many-Body Scarred Eigenstates with Matrix Product States
Quantum many-body scarred systems host nonthermal excited eigenstates immersed in a sea of thermal ones. In cases where exact expressions for these special eigenstates are not known, it is computationally demanding to distinguish them from their exponentially many thermal neighbors. We propose a matrix-product-state (MPS) algorithm, dubbed DMRG-$S$, to extract …