Quantum Noise in the Josephson Charge Qubit

Astafiev, Oleg V. and Pashkin, Yuri and Nakamura, Y. and Yamamoto, T. and Tsai, Jaw-Shen (2004) Quantum Noise in the Josephson Charge Qubit. Physical review letters, 93 (26). ISSN 0031-9007

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We study decoherence of the Josephson charge qubit by measuring energy relaxation and dephasing with help of the single-shot readout. We found that the dominant energy relaxation process is a spontaneous emission induced by quantum noise coupled to the charge degree of freedom. Spectral density of the noise at high frequencies is roughly proportional to the qubit excitation energy

Item Type: Journal Article
Journal or Publication Title: Physical review letters
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100
Departments: Faculty of Science and Technology > Physics
ID Code: 84742
Deposited By: ep_importer_pure
Deposited On: 20 Feb 2017 10:22
Refereed?: Yes
Published?: Published
Last Modified: 25 Feb 2020 07:49
URI: https://eprints.lancs.ac.uk/id/eprint/84742

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