- #1
Dragonfall
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- 4
I don't know where this question belongs:
Given many pairs of [tex]\left|\Psi\right>[/tex] and [tex]U\left|\Psi\right>[/tex], for some unitary U, is it possible to identify U without completely determining the two states independently? I mean what is the least possible number of pairs needed (to be x% certain), and is it less than simply determining the two states?
Given many pairs of [tex]\left|\Psi\right>[/tex] and [tex]U\left|\Psi\right>[/tex], for some unitary U, is it possible to identify U without completely determining the two states independently? I mean what is the least possible number of pairs needed (to be x% certain), and is it less than simply determining the two states?