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Cited by 1,215

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Coherent Quantum Dynamics of a Superconducting Flux Qubit

Open access
Chiorescu, I., Nakamura, Y., Harmans, C. J. P. M., Mooij, J. E.·2003·Science

Abstract

We have observed coherent time evolution between two quantum states of a superconducting flux qubit comprising three Josephson junctions in a loop. The superposition of the two states carrying opposite macroscopic persistent currents is manipulated by resonant microwave pulses. Readout by means of switching-event measurement with an attached superconducting quantum interference device revealed quantum-state oscillations with high fidelity. Under strong microwave driving, it was possible to induce hundreds of coherent oscillations. Pulsed operations on this first sample yielded a relaxation time of 900 nanoseconds and a free-induction dephasing time of 20 nanoseconds. These results are promising for future solid-state quantum computing.

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Crossref · 10.1126/science.1081045

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Metadata

Authors
Chiorescu, I., Nakamura, Y., Harmans, C. J. P. M., & Mooij, J. E.
Venue
Science
Published
2003-03-21
Volume
299
Issue
5614
Pages
1869-1871
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W1966700487
Cited by
1,215
References
1
FWCI
125.09
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Coherent Quantum Dynamics of a Superconducting Flux Qubit. https://app.cochat.ai/papers/10.1126/science.1081045
The paper
Chiorescu, I., Nakamura, Y., Harmans, C. J. P. M., & Mooij, J. E. (2003). Coherent Quantum Dynamics of a Superconducting Flux Qubit. Science. https://doi.org/10.1126/science.1081045

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.