Suppressing non-Markovian noises by coupling the qubit to a chaotic device

Details Suppressing non-Markovian noises by coupling the qubit to a chaotic device Suppressing non-Markovian noises by coupling the qubit to a chaotic device

2011-01-05

arxiv.org/abs/1101.0890v2

Physics

Quantum Physics

This paper has been withdrawn by the author due to big changes in the title, the author list, and the content. The new version

Scientific paper

To suppress decoherence of solid-state qubits which are coupled to the non-Markovian noises, we propose a strategy to couple the qubit with a chaotic device, of which the broad power distribution in the high-frequency domain can be used to freeze the noises just like the dynamical decoupling control (DDC) method. Compared with the DDC, high-frequency components can be generated by the chaotic device even driven by a low-frequency field and we do not need to optimize the control fields to generate complex control pulses. As an application to superconducting circuits, we find that various noises in a wide frequency domain, including low-frequency $1/f$, high-frequency Ohmic, sub-Ohmic, and super-Ohmic noises, can be efficiently suppressed by coupling the qubit to a Duffing oscillator, and the decoherence rate of the qubit is efficiently decreased for about 100 times in magnitude.

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