Dear all
In the following program related to quantum wire I find a runtime error
even though I get the system
structure o.k. Please help me.
The file is attached herewith.
Thanks.
K.K.Ghosh
untitled
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Dear Joseph Weston,
Very many thanks for your instruction to run my code successfully. But, it did
not work, instead
it sent message "run time error" after showing the system plot. Yes, I simply
changed to
kwant.plotter.bands(sys.leads[0],show=False).
It is a question to me how the "sys" in
Dear all members of Kwant community:
My objective is to write a Kwant coding for E-k dispersion relation of 2D
electron
gas. I have followed the relevant code of quantum well. But, I cannot insert
the proper
placing of the method" bands" in that code so that I can get the profile of:
Dear All,
I find help from the tutorials to study conductance, DOS etc for
nano-structures. But when I
try to investigate with kwant drain characteristics (Vd verus Id) and
transconductance (Vg
versus Id) in nanostructures like heterostructure devices of quantum well or
QPC, I fall
into a
Hi all,
Many thanks to all the developers of kwant not only for the strong potential
development of the code but
very specially also for the help to solve coding and related physics problems.
Presently, I am wondering
how to calculate current in a device, say a QWR, connected to source and
Dear All,
I have tried with a kwant code to see the transmission through barrier
imposed by a qwr between the
source and drain. The wire is constructed and its bands are formed
successfully; but the plot of
transmission through the constant barrier is not obtained. In the long run, I
Dear Kwant Developers,
We use Kwant 1.2.2 in the background of Python 3.4. We now understand that
the Kwant package is
updated to 1.3. The Kwant official website (https://kwant-project.org/install)
recommends to download the
packages from the website of Christoph Gohlke
.Dear all,Right now I am working with spin
transport. Kwant documentations 2.3 of docu1.0.5 and 2.7of docu1.3.2 are
very much helpful and informative to my study. I have a few questions/ doubts
to understand the Hamiltonians meaningfully.Hamiltonian for spin
(docu2.7) :-
Dear Developer,The discretised Hamiltonan
shown in Kwant release version 1.4.0 in Article# 2.2.1 is not being understood
when I try to attach significance of ket and bra state
to the symbols e.g. │i+1,j i,j│etc.The
discretised 1D -Hamiltonian is given like :H= [-tn-1 -2tn
+tn+1] /a2t
