[LUG.ro Mix] Long-range coupling and scalable architecture for superconducting
flux qubits
Horacio Castellini
lugro-mix@lugro.org.ar
Wed, 28 Feb 2007 16:12:14 -0300
Para los que les interese como va el arte de la computadora cuántica...
(a Febrero de 2007)
http://lanl.arxiv.org/abs/cond-mat/0702620
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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,
incorporation of classical control circuitry, power dissipation, and
fault-tolerant considerations such as permitting a universal set of
logical gates, parallelism, measurement and initialization, and data
mobility.
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