Correcting low-frequency noise with continuous measurement

Details Correcting low-frequency noise with continuous measurement Correcting low-frequency noise with continuous measurement

2006-06-19

arxiv.org/abs/quant-ph/0606158v1

Phys. Rev. Lett. 98, 153602 (2007)

Physics

Quantum Physics

10 pages, 3 figures, submitted

Scientific paper

10.1103/PhysRevLett.98.153602

Low-frequency noise presents a serious source of decoherence in solid-state qubits. When combined with a continuous weak measurement of the eigenstates, the low-frequency noise induces a second-order relaxation between the qubit states. Here we show that the relaxation provides a unique approach to calibrate the low-frequency noise in the time-domain. By encoding one qubit with two physical qubits that are alternatively calibrated, quantum logic gates with high fidelity can be performed.

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