Physics – Quantum Physics
Scientific paper
2011-07-02
Physics
Quantum Physics
12 pages
Scientific paper
In this paper we discuss the fidelity of states in infinite dimensional
systems, give an elementary proof of the infinite dimensional version of
Uhlmann's theorem, and then, apply it to generalize several properties of the
fidelity from finite dimensional case to infinite dimensional case. Some of
them are somewhat different from those for finite dimensional case.
Hou Jinchuan
Qi Xiaofei
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