Second lecture quantum transport.
Was embarrasing for me. Was told many times by experience teachers that one should not prepare for the lecture and withstand this tempation provided it arises. Because in this case you want to improve the lecture, thus making changes, thus making errors, thus getting caught afterwards. No use. So I was caught by two students simultaneously: thanks to them for being attentive and bringing the issue.
The start was not very encouraging. A minute before the start I saw only few students that defied all laws of statistical distribution by filling the least probable back rows. Fortunately, it dramatically changed at mere last moment. I was even able to address the audience "ladies and gentlemen" while have already prepared for "gentlemen". Still: two first attemps to get a response from the audience were not accomodated. Luckily, it got to normal a bit later.
The changes made were intended to bring the lecture slides close to the book and to give more physical significance to the phase shifts. First part, multi-terminal scattering, remained almost intact. In future, I shall find a way to present it faster and in a more interesting fashion. It appears I need more time for interference, second part. Although I’ve spent only 4 minutes joking, I have had an acute time problem and finished at 12:33 only. Sorry, never again. The story "A and B" has been improvised and upon my taste was usefull to illustrate the interference, but I haven’t checked it against other tastes. Please comment on this.
