We can see that multiplying the state vector by a complex phase factor yields the same density matrix, i.e., the same q-state. Hence the phase of the state vector can be deliberately altered, still the same pure q-state is obtained. In the conservative q-theory, contrary to the classical theory, not even the pure state is interpreted on a single system but on the statistical ensemble of identical systems © 2011 Springer-Verlag Berlin Heidelberg.
CITATION STYLE
Diósi, L. (2011). Foundations of Q-physics. Lecture Notes in Physics, 827, 23–36. https://doi.org/10.1007/978-3-642-16117-9_4
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