Dear Author,
I am trying to reproduce the 2.7 section of Tkwant tutorial: Green Function.
When i try to calculate the lesser and retard greens's function occurred this
error:
green_lesser = []
green_retard = []
for time in times:
green.evolve(time, 0)
green.refine_intervals()
green_lesser.append(green.lesser(site_0, site_0))
green_retard.append(green.retarded(site_0, site_0))
/home/gabriel/.local/lib/python3.9/site-packages/kwantspectrum/kwant_spectrum.py:361:
VisibleDeprecationWarning: Creating an ndarray from ragged nested sequences
(which is a list-or-tuple of lists-or-tuples-or ndarrays with different lengths
or shapes) is deprecated. If you meant to do this, you must specify
'dtype=object' when creating the ndarray.
pvec = np.array([b * b / 3, 0, a * a])
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)
/tmp/ipykernel_158862/3957660185.py in <module>
7 green.refine_intervals()
8
----> 9 green_lesser.append(green.lesser(site_0, site_0))
10 green_retard.append(green.retarded(site_0, site_0))
~/.local/lib/python3.9/site-packages/tkwant/greenfunctions.py in lesser(self,
i, j, root)
375 def lesser(self, i, j, root=0):
376 if self._green_lesser is None:
--> 377 self._init_lesser()
378 self._do_jobs(self._jobs_lesser)
379 return self._green_lesser.evaluate(i, j, root)
~/.local/lib/python3.9/site-packages/tkwant/greenfunctions.py in
_init_lesser(self)
430 def _init_lesser(self):
431 logger.debug('init G^<')
--> 432 self._green_lesser = _GreenGeneric(*self._args, **self._kwargs)
433
434 def _init_retarded(self):
~/.local/lib/python3.9/site-packages/tkwant/greenfunctions.py in __init__(self,
refine, *args, **kwargs)
36
37 # no refine on individual wave function based on density
---> 38 self._state0 = manybody.State(*args, **kwargs, refine=False)
39 self._state1 = manybody.State(*args, **kwargs, refine=False)
40
~/.local/lib/python3.9/site-packages/tkwant/manybody.py in __init__(self, syst,
tmax, occupations, params, spectra, boundaries, intervals, refine, combine,
error_op, scattering_state_type, manybody_wavefunction_type, mpi_distribute,
comm)
1511 tasks.update(tasks_)
1512
-> 1513 self.comm = mpi.get_communicator(comm)
1514
1515 psi_init = self._calc_initial_state(tasks, self.comm)
~/.local/lib/python3.9/site-packages/tkwant/mpi.py in get_communicator(comm)
66 if comm is None:
67 if _COMM is None:
---> 68 communicator_init()
69 comm = _COMM
70 return comm
~/.local/lib/python3.9/site-packages/tkwant/mpi.py in communicator_init(comm)
48 if _COMM is None:
49 if comm is None:
---> 50 from mpi4py import MPI
51 _COMM = MPI.COMM_WORLD.Dup()
52 else:
ImportError: libmpi.so.12: cannot open shared object file: No such file or
directory
Someone knows what should i do? I am beginner in python and kwant.
