Hi, everyone
When I use sparsediag to diagnalize the Hamiltonian of Hubbard model, the paprameter is :
CONSERVED_QUANTUMNUMBERS="Nup,Ndown"
Nup_total=6
Ndown_total=6
the system size is L=12, no translation symmetry here, the process will take 100s, which is much slower than our own Davison code(It only take 20s).

if I add the measurements
MEASURE_ENERGY="True"
MEASURE_LOCAL[density]=n
MEASURE_LOCAL[double occupancy]=U*double_occupancy
MEASURE_CORRELATIONS[density matrix_up]="cdag_up:c_up"
MEASURE_CORRELATIONS[density matrix_down]="cdag_down:c_down"
the process will take 900s.

Does anyone know how to speed up this calculation? Or at least avoid the waste time on the measurements

--
Qiaoni Chen
Department of Chemistry,

Princeton University
Princeton, NJ, 08544
Tel +1-609-865-0817