Robust two-qubit quantum registers |
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Authors: | Grigorenko I A Khveshchenko D V |
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Institution: | Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599, USA. |
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Abstract: | 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 interqubit 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 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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