Hi, The theory can be found is many places, for instance in the appendix of
http://journals.aps.org/prx/abstract/10.1103/PhysRevX.2.031004 <http://journals.aps.org/prx/abstract/10.1103/PhysRevX.2.031004> There is an example in the Kwant paper, http://iopscience.iop.org/article/10.1088/1367-2630/16/6/063065;jsessionid=53C3B6B3509E716A9F862046AB11F60D.c4.iopscience.cld.iop.org <http://iopscience.iop.org/article/10.1088/1367-2630/16/6/063065;jsessionid=53C3B6B3509E716A9F862046AB11F60D.c4.iopscience.cld.iop.org> (figure 13 and 14) with the full code given in Appendix D5. Good luck, Xavier > Le 20 oct. 2016 à 16:34, Lee Kin <llwa...@gmail.com> a écrit : > > Hi there, > I start to use kwant not long ago. I am still following the instruction to > learn the basic usage of the code. I have a simple code in hand to handle the > square lattices with some given potential of certain form. I am thinking to > add the constant magnetic field along z direction. In my text, it is said > that such field could be described by vector potential such that the > potential could be modified as alpha*(x**2 + y**2) in which alpha is > proportional to the magnitude of the field. I add this to each lattice site > but then it diverges in solution. I saw other material online and it said the > magnetic field could be added by modifying the hopping phase. I don't quite > follow that. Any suggestion is welcomed. Thanks.
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