Hi Bhavya, Unfortunately this seems to be something I can't help you with—please check with the pybinding community.
Best, Anton On Wed, 1 Sept 2021 at 04:42, BHAVYA BHARDWAJ <bhavya1...@yahoo.com> wrote: > > Respected Anton, > > Thank you for taking the time to answer my query. Yes you are right, I am > using pybinding (https://docs.pybinding.site/en/stable/) to generate the > model and Kwant for calculating the transport characteristics. > > > Thank You, > > Regards, > > Bhavya Bhardwaj > > On Wednesday, 1 September, 2021, 03:20:05 am IST, Anton Akhmerov > <anton.akhmerov...@gmail.com> wrote: > > > Hi Bhavya, > > The error you are seeing is because for some reason the linear system > you're solving has real inputs. Scattering problems are almost never > real, and therefore we didn't bother to support this in the code. > Moreover internally Kwant never produces linear problems that are of > real data type and not complex. Are you using a different package to > generate a Kwant problem? > > Best, > Anton > > On Sun, 13 Jun 2021 at 22:42, BHAVYA BHARDWAJ <bhavya1...@yahoo.com> wrote: > > > > Repected Members, > > > > I am a B.Tech Student using Kwant for simulations. > > Python Version: 3.7.8 > > Kwant Version: 1.4.2 > > Ubuntu 20 > > The Error I faced is given below. > > > > AttributeError Traceback (most recent call last) > > <ipython-input-6-c80da766c4bb> in <module> > > 17 pyplot.ylabel("conductance [e^2/h]") > > 18 pyplot.show() > > ---> 19 solving(model.tokwant()) > > > > <ipython-input-6-c80da766c4bb> in solving(sys) > > 7 energy = ie * 0.01 > > 8 # compute the scattering matrix at a given energy > > ----> 9 smatrix = kwant.greens_function(sys, > > energy,check_hermiticity=False) > > 10 # compute the transmission probability from lead 0 to > > 11 # lead 1 > > > > ~/Downloads/112358/lib/python3.7/site-packages/kwant/_common.py in > > inner(*args, **kwargs) > > 70 if sig.bind(*args, > > **kwargs).arguments.get(parameter_name): > > 71 warn() > > ---> 72 return f(*args, **kwargs) > > 73 > > 74 return inner > > > > ~/Downloads/112358/lib/python3.7/site-packages/kwant/solvers/common.py in > > greens_function(self, sys, energy, args, out_leads, in_leads, > > check_hermiticity, params) > > 485 rhs = sp.bmat([[i for i in linsys.rhs if i.shape[1]]], > > 486 format=self.rhsformat) > > --> 487 flhs = self._factorized(linsys.lhs) > > 488 data = self._solve_linear_sys(flhs, rhs, kept_vars) > > 489 > > > > ~/Downloads/112358/lib/python3.7/site-packages/kwant/solvers/mumps.py in > > _factorized(self, a) > > 102 def _factorized(self, a): > > 103 inst = mumps.MUMPSContext() > > --> 104 inst.factor(a, ordering=self.ordering) > > 105 return inst > > 106 > > > > ~/Downloads/112358/lib/python3.7/site-packages/kwant/linalg/mumps.py in > > factor(self, a, ordering, ooc, pivot_tol, reuse_analysis, overwrite_a) > > 318 row, col, > > data) > > 319 else: > > --> 320 self.analyze(a, ordering=ordering, > > overwrite_a=overwrite_a) > > 321 > > 322 self.mumps_instance.icntl[22] = 1 if ooc else 0 > > > > ~/Downloads/112358/lib/python3.7/site-packages/kwant/linalg/mumps.py in > > analyze(self, a, ordering, overwrite_a) > > 227 > > 228 if dtype != self.dtype: > > --> 229 self.mumps_instance = getattr(_mumps, > > dtype+"mumps")(self.verbose) > > 230 self.dtype = dtype > > 231 > > > > AttributeError: module 'kwant.linalg._mumps' has no attribute 'dmumps' > > > > > > Kindly guide me so I can overcome this error. > > > > > > Thank You, > > > > Regards, > > > > Bhavya Bhardwaj > > > > > >
