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cond-mat.str-el2026
Hartree-Fock Density-Matrix Renormalization Group for Very Long Chains
Steven R. White
We formulate Hartree--Fock as a density-matrix renormalization group (DMRG) sweep of a single Slater determinant, assuming a density--density electron--electron interaction. We com…
cond-mat.str-el2026
Fast Tensor Network Imaginary Time Evolution by Implicit Stepping on Logarithmic Grids
John P. Zima, E. Miles Stoudenmire, Steven R. White +2
We present a new method for the efficient imaginary time evolution of quantum many-body wavefunctions represented by matrix product states (MPS). We first show that logarithmic tim…
cond-mat.str-el2024
Unusual energy spectra of matrix product states
J. Maxwell Silvester, Giuseppe Carleo, Steven R. White
In approximate ground states obtained from imaginary-time evolution, the spectrum of the state -- its decomposition into exact energy eigenstates -- falls off exponentially with th…