Example: vertex function

This example reproduces Fig 10 in Hafermann, Patton and Werner. It corresponds to a impurity site coupled with a single bath level. The hybridization function here is constant.

To run the calculation, first prepare the input file of the imaginary time hybridization function (e.g. Delta.dat):

0    -0.5    -0.5
1    -0.5    -0.5
...
500  -0.5    -0.5

Then prepare the parameter file (e.g. cthyb.param):

BETA=10
FLAVORS=2
U=4
MU=0
t=1
tprime=0
N=500
NMATSUBARA=500

MAX_TIME=7200

[cthyb]
DELTA=Delta.dat
N_MEAS=50
THERMALIZATION=1000
SWEEPS=10000000000000
TEXT_OUTPUT=1
MEASURE_freq=1
MEASURE_g2w=1
MEASURE_h2w=1
N_W=20
N_w2=40
COMPUTE_VERTEX=1

Then use alps_cthyb cthyb.param or with MPI if any to run the simulation.