Known issues

Known issues

• Instability of worm measurement of equal-time single-particle Green's function
  When the mean number of electrons is very close to 0, the measurement of equal-time single-particle/two-particle Green's functions becomes unstable. You may see error messages something like "Configuration space for **** was not visited in measurement steps. Thermalization time may be too short." This means that you failed to obtain converged estimates of the volumes of their configuration spaces in the given thermalization time. This is because the volumes of their configuration spaces vanish.

In practical, one may increase the thermalization time, or (if it does not help) change the chemical potential. This is a technical issue in the current implementation. We will solve this issue in the next minor update.