Another measure of how well a quantum channel preserves information is called channel fidelity, and it arises from fidelity of quantum states.
Read more about this topic: Quantum Channel
Famous quotes containing the words channel and/or fidelity:
“Children belong in families, which, ideally, serve as a sanctuary and a cushion from the world at large. Parents belong to society and are a part of that greater world. Sometimes parents are a channel to the larger society, sometimes they are a shield from it. Ideally they act as filters, guiding their children and teaching them to avoid the tempting trash.”
—Louise Hart (20th century)
“Total loyalty is possible only when fidelity is emptied of all concrete content, from which changes of mind might naturally arise.”
—Hannah Arendt (1906–1975)