Physics – Condensed Matter – Superconductivity
Scientific paper
2007-02-26
PRB 76, 174507 (2007)
Physics
Condensed Matter
Superconductivity
8 pages, 11 figures
Scientific paper
10.1103/PhysRevB.76.174507
Constructing a fault-tolerant quantum computer is a daunting task. Given any design, it is possible to determine the maximum error rate of each type of component that can be tolerated while still permitting arbitrarily large-scale quantum computation. It is an underappreciated fact that including an appropriately designed mechanism enabling long-range qubit coupling or transport substantially increases the maximum tolerable error rates of all components. With this thought in mind, we take the superconducting flux qubit coupling mechanism described in PRB 70, 140501 (2004) and extend it to allow approximately 500 MHz coupling of square flux qubits, 50 um a side, at a distance of up to several mm. This mechanism is then used as the basis of two scalable architectures for flux qubits taking into account crosstalk and fault-tolerant considerations such as permitting a universal set of logical gates, parallelism, measurement and initialization, and data mobility.
Fowler Austin G.
Plourde B. L. T.
Stephens Ashley M.
Thompson William F.
Wilhelm Frank K.
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