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Decoherence of Flux Qubits due to1/fFlux Noise

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Yoshihara, F., Harrabi, K., Niskanen, A. O., Nakamura, Y., Tsai, J. S.·2006·Physical Review Letters

Abstract

We have investigated decoherence in Josephson-junction flux qubits. Based on the measurements of decoherence at various bias conditions, we discriminate contributions of different noise sources. We present a Gaussian decay function extracted from the echo signal as evidence of dephasing due to 1/f flux noise whose spectral density is evaluated to be about (10(-6)Phi0)2/Hz at 1 Hz. We also demonstrate that, at an optimal bias condition where the noise sources are well decoupled, the coherence observed in the echo measurement is limited mainly by energy relaxation of the qubit.

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Metadata

Authors
Yoshihara, F., Harrabi, K., Niskanen, A. O., Nakamura, Y., & Tsai, J. S.
Venue
Physical Review Letters
Published
2006-10-17
Volume
97
Issue
16
Pages
167001-167001
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
OpenAlex
W2000386694
Cited by
393
References
1
FWCI
23.73
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Decoherence of Flux Qubits due to1/fFlux Noise. https://app.cochat.ai/papers/10.1103/physrevlett.97.167001
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Yoshihara, F., Harrabi, K., Niskanen, A. O., Nakamura, Y., & Tsai, J. S. (2006). Decoherence of Flux Qubits due to1/fFlux Noise. Physical Review Letters. https://doi.org/10.1103/physrevlett.97.167001

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