A Monte Carlo approach to bound Trotter error

Data files and scripts for "A Monte Carlo approach to bound Trotter error". There are four sets of tar.gz files: norm_results.tar.gz contains the numerical values of norm estimates presented in figures. python_scripts_and_files.tar.gz contains scripts to set up the Hamiltonians and commutators considered, and also to generate integral and operator files used as input to FCIQMC and DMRG calculations, respectively. dmrg_results.tar.gz contains input and output files for DMRG calcualtions, performed with the Block2 code. fciqmc_results_*.tar.gz contain input and outputs files for FCIQMC simulations, performed with the HANDE-QMC code. They also contain scripts used to perform error analysis of the FCIQMC simulations, and results of the error anaysis. Note that tar.gz files with "extended" in their name correspond to extended Hubbard model results.