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Dephasing of a Superconducting Qubit Induced by Photon Noise
Open accessAbstract
We have studied the dephasing of a superconducting flux qubit coupled to a dc-SQUID based oscillator. By varying the bias conditions of both circuits we were able to tune their effective coupling strength. This allowed us to measure the effect of such a controllable and well-characterized environment on the qubit coherence. We can quantitatively account for our data with a simple model in which thermal fluctuations of the photon number in the oscillator are the limiting factor. In particular, we observe a strong reduction of the dephasing rate whenever the coupling is tuned to zero. At the optimal point we find a large spin-echo decay time of .
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Cited by
Ladd, T. D., Jelezko, F., Laflamme, R., Nakamura, Y., Monroe, C., & O’Brien, J. L. (2010) · Nature · doi:10.1038/nature08812 · Cited by 3,592
Superconducting Qubits: Current State of Play
Kjaergaard, M., Schwartz, M. E., Braumüller, J., Krantz, P., Wang, J. I.-J., Gustavsson, S., & Oliver, W. D. (2020) · Annual Review of Condensed Matter Physics · doi:10.1146/annurev-conmatphys-031119-050605 · Cited by 1,544
Atomic physics and quantum optics using superconducting circuits
You, J. Q., & Nori, F. (2011) · Nature · doi:10.1038/nature10122 · Cited by 1,311
Simple Pulses for Elimination of Leakage in Weakly Nonlinear Qubits
Motzoi, F., Gambetta, J. M., Rebentrost, P., & Wilhelm, F. K. (2009) · Physical Review Letters · doi:10.1103/physrevlett.103.110501 · Cited by 814
The flux qubit revisited to enhance coherence and reproducibility
Yan, F., Gustavsson, S., Kamal, A., Birenbaum, J., Sears, A. P., Hover, D., Gudmundsen, T. J., Rosenberg, D., Samach, G., Weber, S., et al. (2016) · Nature Communications · doi:10.1038/ncomms12964 · Cited by 587
Metadata
- Authors
- Bertet, P., Chiorescu, I., Burkard, G., Semba, K., Harmans, C. J. P. M., DiVincenzo, D. P., & Mooij, J. E.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2005-12-13
- Volume
- 95
- Issue
- 25
- Pages
- 257002-257002
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2166258489
- Cited by
- 313
- References
- 0
- FWCI
- 26.80
- Type
- journal article
- Language
- en
- Open access
- green
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- Bertet, P., Chiorescu, I., Burkard, G., Semba, K., Harmans, C. J. P. M., DiVincenzo, D. P., & Mooij, J. E. (2005). Dephasing of a Superconducting Qubit Induced by Photon Noise. Physical Review Letters. https://doi.org/10.1103/physrevlett.95.257002
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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