Detrimental Decoherence

Details Detrimental Decoherence Detrimental Decoherence

2008-06-15

arxiv.org/abs/0806.2443v1

Physics

Quantum Physics

A revision and an extension of the formal part of quant-ph/0607021. The paper contains new conjectures on general quantum syst

Scientific paper

We propose and discuss two conjectures on the nature of information leaks (decoherence) for quantum computers. These conjectures, if (or when) they hold, are damaging for quantum error-correction as required by fault-tolerant quantum computation. The first conjecture asserts that information leaks for a pair of substantially entangled qubits are themselves substantially positively correlated. The second conjecture asserts that in a noisy quantum computer with highly entangled qubits there will be a strong effect of error synchronization. We present more general conjectures for arbitrary noisy quantum systems.

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