DOI: 10.1126/science.1062266. Time-Resolved Measurement of Dissipation-Induced Decoherence in a Josephson Junction

Time-Resolved Measurement of Dissipation-Induced Decoherence in a Josephson Junction

10.1126/science.1062266

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

We determined the dissipation-induced decoherence time (DIDT) of a superconducting Josephson tunnel junction by time-resolved measurements of its escape dynamics. Double-exponential behavior of the time-dependent escape probability was observed, suggesting the occurrence of a two-level decay-tunneling process in which energy relaxation from the excited to the ground level significantly affects the escape dynamics of the system. The observation of temporal double-exponential dependence enables direct measurements of the DIDT, a property critical to the study of quantum dynamics and the realization of macroscopic quantum coherence and quantum computing. We found that the DIDT was τ d > 11 μs at T = 0.55 K, demonstrating good prospects for implementing quantum computing with Josephson devices.

Bibliography

Han, S., Yu, Y., Chu, X., Chu, S.-I., & Wang, Z. (2001). Time-Resolved Measurement of Dissipation-Induced Decoherence in a Josephson Junction. Science, 293(5534), 1457â1459.

Authors 5

Siyuan Han (first)
Yang Yu (additional)
Xi Chu (additional)
Shih-I Chu (additional)
Zhen Wang (additional)

References 30 Referenced 91

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S.H. is grateful to J. Lukens D. Averin and J. Martinis for stimulating comments and suggestions. The authors also acknowledge Y. Zhang V. Patel W. Qiu L. Olafsen and S. Li for technical assistance. This work was supported in part by the U.S. Air Force Office of Scientific Research (F49620-99-1-0205) the State of Kansas (S99041) and NSF (DMR9876874 and EIA0082499).

Dates

Type	When
Created	23 years, 1 month ago (July 27, 2002, 5:53 a.m.)
Deposited	1 year, 7 months ago (Jan. 9, 2024, 5:10 p.m.)
Indexed	4 months, 3 weeks ago (April 13, 2025, 12:54 a.m.)
Issued	24 years ago (Aug. 24, 2001)
Published	24 years ago (Aug. 24, 2001)
Published Print	24 years ago (Aug. 24, 2001)

Funders 0

None

BibTeX

@article{Han_2001, title={Time-Resolved Measurement of Dissipation-Induced Decoherence in a Josephson Junction}, volume={293}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1062266}, DOI={10.1126/science.1062266}, number={5534}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Han, Siyuan and Yu, Yang and Chu, Xi and Chu, Shih-I and Wang, Zhen}, year={2001}, month=aug, pages={1457–1459} }

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