On 27 Aug 2008, at 16:56, João Manuel Viana Parente Lopes wrote:
Dear colleagues,
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?
The error bars should go down as 1/sqrt(number of sweeps). Thus increasing it by a factor of 2 only makes the errors go down by 30%
Matthias