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Fluxonium: Single Cooper-Pair Circuit Free of Charge Offsets

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Science  02 Oct 2009:
Vol. 326, Issue 5949, pp. 113-116
DOI: 10.1126/science.1175552

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Quiet, Please

One approach for building quantum computers is based on superconductors with appropriately designed components to control the pairs of charges flowing through the circuits. However, at the single-electron level, required quantum noise—generated by quantum fluctuations and throwing offset charges into the device—presents a real problem in manipulating the delicate quantum states of the qubits. Manucharyan et al. (p. 113) present a clever piece of quantum circuit engineering that can suppress the effect of the quantum noise and allow the quantum circuit to operate without disturbance.

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