Robust two-qubit quantum registers

Details Robust two-qubit quantum registers Robust two-qubit quantum registers

2003-12-15

arxiv.org/abs/cond-mat/0312349v2

Phys. Rev. Lett. 94, 040506 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

Latex, 4 pages, 4 figures, colored figures, accepted for publishing in PRL

Scientific paper

10.1103/PhysRevLett.94.040506

We carry out a systematic analysis of a pair of coupled qubits, each of which is subject to its own dissipative environment, and argue that a combination of the inter-qubit couplings which provides for the lowest possible decoherence rates corresponds to the incidence of a double spectral degeneracy in the two-qubit system. We support this general argument by the results of of an evolutionary genetic algorithm which can also be used for optimizing time-dependent processes (gates) and their sequences that implement various quantum computing protocols.

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