Physics – Quantum Physics
Scientific paper
2007-09-02
Physics
Quantum Physics
v3: 8 pages, 3 figures, explicit numerical example comparing OQFT to QFT added
Scientific paper
In this paper we introduce a universal operator theoretic framework for quantum fault tolerance. This incorporates a top-down approach that implements a system-level criterion based on specification of the full system dynamics, applied at every level of error correction concatenation. This leads to more accurate determinations of error thresholds than could previously be obtained. This is demonstrated both formally and with an explicit numerical example. The basis for our approach is the Quantum Computer Condition (QCC), an inequality governing the evolution of a quantum computer. We show that all known coding schemes are actually special cases of the QCC. We demonstrate this by introducing a new, operator theoretic form of entanglement assisted quantum error correction, which incorporates as special cases all known error correcting protocols, and is itself a special case of the QCC.
Aggarwal Vaneet
Calderbank Robert A.
Gilbert Gerald
Hamrick Michael
Weinstein Yaakov S.
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