TRIQS/TRIQS — Issue #2: Wrong gw for D=0
Author: A32167
Created: 2011-11-09 15:02:37+00:00
State: open

Succesfully installed and compiled TRIQS. I have made a run of example aim.py ( http://ipht.cea.fr/triqs/doc/user_manual/solvers/aim.html ). Everything is fine, gw over matsubaras looks smooth.
The output for D=0.2 is: ![D=0.2](http://img257.imageshack.us/img257/6105/screenshot20111109at154.png)

However, as soon as i turn off the hybridization with the bath (D=0), I get weird imaginary frequency dependent green's function.
The output for D=0 is : ![D=0](http://img411.imageshack.us/img411/6105/screenshot20111109at154.png)

Here is the diff of script against aim.py from the example (the error persists with increasing the number of QMC cycles):

antipov@r2d2_v2 ~/calc/triqs_test $ diff aim.py aim_backup.py
5,6c5,6
< D, V, U = 1.0, 0.0, 4.0
< e_f, Beta = -U/2.0, 10
---
> D, V, U = 1.0, 0.2, 4.0
> e_f, Beta = -U/2.0, 50
15c15
< N_Cycles = 100000, # Number of QMC cycles
---
> N_Cycles = 500000, # Number of QMC cycles