Editing Quantum information (section)

===Quantum error correction===

{{Main|Quantum error correction}}

'''QEC''' is used in [[Quantum computer|quantum computing]] to protect quantum information from errors due to [[decoherence]] and other [[quantum noise]]. Quantum error correction is essential if one is to achieve fault-tolerant quantum computation that can deal not only with noise on stored quantum information, but also with faulty quantum gates, faulty quantum preparation, and faulty measurements.

[[Peter Shor]] first discovered this method of formulating a ''quantum error correcting code'' by storing the information of one qubit onto a highly entangled state of [[Ancilla bit|ancilla qubits]]. A quantum error correcting code protects quantum information against errors.