Hello,
I think there is contradictions between the solutions of exercice 1 and 2 of homework 8 and between the course or maybe I am totally wrong :
1) Exercice 2:
bell states in course
bell states in the solution:
which are different and lead to different solutions
2)Exercice 1:
In the course we use Z for 10 state:
in the solution its iY which is XZ :
Thank you.
Hello Ghalia,
You are right, the conventions may vary between the course and exercises, and it wasn't clearly specified in the Homework. We kept that in mind while correcting exercises 1 and 2.
The important point is that, whatever convention you chose, it stays consistent throughout the exercise. For instance for the teleportation, the appropriate operator I, X, Z, iY has to be applied depending on your convention so as to get back the same extra-state (or possibly the same with a phase change).
We will be extra-careful and give correctly the Bell basis in the exam ;)
Antoine
(PS: There was in fact a discussion earlier - but in french - about this issue https://moodlearchive.epfl.ch/2022-2023/mod/forum/discuss.php?d=82787 )
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