Hi Joe, Sorry, I have to take back my words about unusual asymmetry of the current. It was caused by a real asymmetry of my geometry. I have checked that summing modes of lead 0 leads to the same (but opposite) current, as summing modes of lead 1. Thank you so much for your help! Best wishes, Sergey On 19/10/18 14:51, Joseph Weston wrote:
Also, I found that current asymmetry was indeed there and it was caused by numerical errors: the precision of the current calculation is higher near the lead for which it is calculated, while the error may grow significant near other lead(s). In my case, at some energies it is symmetric, at some - not.
This is very surprising; do you think that this could be a bug in Kwant? Can you share a simple script that reproduces this issue (the simpler the better; that way it's easy to debug)?