I'm making my first experiments with Alps...

I was comparing the average energy for small temperatures (T~ 0.01, J = 1) in the 1D Heisenberg model

with the exact solution for small open linear chains using the loop program with de SSE representation.

I notice that I can not decrease the error bars by the increase of the numbers of SWEEPS!

How can I decrease the error bars?

Thanks in advance

Joćo Lopes

PS: A sugestion: It would be very helpful if we could do a search in the mailing list

Maybe this link could help: http://wiki.list.org/display/DOC/How+do+I+make+the+archives+searchable