Fidelity Of Quantum States
In quantum information theory, fidelity is a measure of the "closeness" of two quantum states. It is not a metric on the space of density matrices, but it can be used to define the Bures metric on this space.
Read more about Fidelity Of Quantum States: Motivation, Definition, Fidelity of Quantum Measurements
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—Hannah Arendt (1906–1975)
“But how is one to make a scientist understand that there is something unalterably deranged about differential calculus, quantum theory, or the obscene and so inanely liturgical ordeals of the precession of the equinoxes.”
—Antonin Artaud (1896–1948)
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—Friedrich Dürrenmatt (1921–1990)