DocumentCode :
550997
Title :
Using chaotic device to suppress non-Markovian quantum noises
Author :
Zhang Jing ; Wu Rebing
Author_Institution :
Dept. of Autom., Tsinghua Univ., Beijing, China
fYear :
2011
fDate :
22-24 July 2011
Firstpage :
5346
Lastpage :
5351
Abstract :
To suppress decoherence of solid-state qubits induced by non-Markovian noises, we propose a strategy to couple the qubit with a chaotic device, whose broad power distribution in the high-frequency domain can be used to freeze the noises in the similar way of 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 thus the control fields do not need any optimization. Thus, our method is easier to be realized in experiments. As an application to superconducting circuits, we find that various noises in a broad band, 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 by about 100 times in magnitude. Using experimentally realizable parameters, the decoherence time of the superconducting charge qubit can reach 200 μs by our method, which is 10 ~ 100 times longer in magnitude than that observed in experiments.
Keywords :
1/f noise; chaos; discrete time systems; interference suppression; nonlinear dynamical systems; quantum computing; quantum noise; superconducting device noise; Duffing oscillator; broad power distribution; broadband noise; chaotic device; control fields; decoherence suppression; high-frequency Ohmic noise; high-frequency components; high-frequency domain; low-frequency 1/f noise; low-frequency field; nonMarkovian quantum noise suppression; quantum control; solid-state qubits; subOhmic noise; superOhmic noise; superconducting charge qubit; superconducting circuit; Chaos; Coherence; Electronic mail; Information science; Laser radar; Superconducting device noise; Chaos; Decoherence Control; Quantum Control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Control Conference (CCC), 2011 30th Chinese
Conference_Location :
Yantai
ISSN :
1934-1768
Print_ISBN :
978-1-4577-0677-6
Electronic_ISBN :
1934-1768
Type :
conf
Filename :
6001339
Link To Document :
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