Physics
R. Jozsa
1994.12.1JOURNAL OF MODERN OPTICS
Abstract
Abstract We propose a definition of fidelity for mixed quantum states in terms of Uhlmann's ‘transition probability’ formula F(ϱ1, ϱ2) = {trace [(√ϱ1ϱ2 × √ϱ1)1/2]}2 and give new elementary proofs of its essential properties.
Citation format
JOZSA, R. Fidelity for mixed quantum states. JOURNAL OF MODERN OPTICS, 1994, 41: 2315–2323.