Tools /
## MpEaDmrgOptimise an EA wavefunction with multi-site windows using the EA DMRG algorithm. ## Synopsis
Brief description ## Options
Show help message.
`--Hamiltonian` The operator the use for the Hamiltonian (if unspecified, use wavefunction attribute `Hamiltonian` of `psi` ).
`--wavefunction` The filename of the EA wavefunction to be optimised ( required).
`--num` The number of sweeps to perform (default 2).
Error tolerance for the local eigensolver (default `1e-10` ).
Error tolerance for the GMRES algorithm for solving the left and right block Hamiltonians (default `1e-13` ).
Error tolerance for the magnitude of transfer matrix eigenvalues close to one (default `1e-12` ).
Reduce the amount of normal output made by the program.
`--verbose` Increase verbosity.
## DescriptionThis tool optimises the energy of the multi-site window EA wavefunction by sweeping through all of the windows simultaneously, updating the {$n$}th site of each window at the same time, using an algorithm based on finite-size DMRG. |

Page last modified on October 12, 2023, at 02:56 AM