On 14 Mar 2014, at 03:25, vvarma@ictp.it wrote:
Hi Matthias,
Thanks, that's very helpful.
Could you please mention if the 'CONSERVED_QUANTUMNUMBERS=N' and 'N_total = xx' options are ignored by the SSE and Worm algorithms of ALPS?
Indeed, these are options only for the exact diagonalization and DMRG codes
(If so, perhaps things will be different in a newer ALPS version? I'm using 2.1.) I can't seem to run a fixed particle-number simulation using either of these algorithms (final output density not equalling desired density),
That's correct. The SSW and worm codes work in the grand canonical ensemble. You need to tune the chemical potential to obtain results for a certain (average) particle number.
Matthias