General Codes
In general, a quantum code for a quantum channel is a subspace, where is the state Hilbert space, such that there exists another quantum channel with
where is the orthogonal projection onto . Here is known as the correction operation.
Read more about this topic: Quantum Error Correction
Famous quotes containing the words general and/or codes:
“Pleasure is necessarily reciprocal; no one feels it who does not at the same time give it. To be pleased, one must please. What pleases you in others, will in general please them in you.”
—Philip Dormer Stanhope, 4th Earl Chesterfield (16941773)
“... until both employers and workers groups assume responsibility for chastising their own recalcitrant children, they can vainly bay the moon about ignorant and unfair public criticism. Moreover, their failure to impose voluntarily upon their own groups codes of decency and honor will result in more and more necessity for government control.”
—Mary Barnett Gilson (1877?)