Spectroscopy of low-frequency noise and its temperature dependence in a superconducting qubit
We report a direct measurement of the low-frequency noise spectrum in a superconducting flux qubit. Our method uses the noise sensitivity of a free-induction Ramsey interference experiment, comprising free evolution in the presence of noise for a fixed period of time followed by single-shot qubit-st...
| Main Authors: | , , , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2012
|
| Online Access: | http://hdl.handle.net/1721.1/71784 https://orcid.org/0000-0002-7069-1025 https://orcid.org/0000-0002-4674-2806 https://orcid.org/0000-0002-4436-6886 |
| _version_ | 1826213138811322368 |
|---|---|
| author | Orlando, Terry Philip Yan, Fei Bylander, Jonas Gustavsson, Simon Yoshihara, Fumiki Harrabi, Khalil Cory, David G. Nakamura, Yasunobu Tsai, Jaw-Shen Oliver, William D. |
| author2 | Lincoln Laboratory |
| author_facet | Lincoln Laboratory Orlando, Terry Philip Yan, Fei Bylander, Jonas Gustavsson, Simon Yoshihara, Fumiki Harrabi, Khalil Cory, David G. Nakamura, Yasunobu Tsai, Jaw-Shen Oliver, William D. |
| author_sort | Orlando, Terry Philip |
| collection | MIT |
| description | We report a direct measurement of the low-frequency noise spectrum in a superconducting flux qubit. Our method uses the noise sensitivity of a free-induction Ramsey interference experiment, comprising free evolution in the presence of noise for a fixed period of time followed by single-shot qubit-state measurement. Repeating this procedure enables Fourier-transform noise spectroscopy with access to frequencies up to the achievable repetition rate, a regime relevant to dephasing in ensemble-averaged time-domain measurements such as Ramsey interferometry. Rotating the qubit's quantization axis allows us to measure two types of noise: effective flux noise and effective critical-current or charge noise. For both noise sources, we observe that the very same 1/f-type power laws measured at considerably higher frequencies (0.2−20 MHz) are consistent with the noise in the 0.01−100-Hz range measured here. We find no evidence of temperature dependence of the noises over 65−200 mK, and also no evidence of time-domain correlations between the two noises. These methods and results are pertinent to the dephasing of all superconducting qubits. |
| first_indexed | 2024-09-23T15:43:57Z |
| format | Article |
| id | mit-1721.1/71784 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:43:57Z |
| publishDate | 2012 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/717842022-10-02T03:43:20Z Spectroscopy of low-frequency noise and its temperature dependence in a superconducting qubit Orlando, Terry Philip Yan, Fei Bylander, Jonas Gustavsson, Simon Yoshihara, Fumiki Harrabi, Khalil Cory, David G. Nakamura, Yasunobu Tsai, Jaw-Shen Oliver, William D. Lincoln Laboratory Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Massachusetts Institute of Technology. Research Laboratory of Electronics Orlando, Terry Philip Orlando, Terry Philip Yan, Fei Bylander, Jonas Gustavsson, Simon Oliver, William D. We report a direct measurement of the low-frequency noise spectrum in a superconducting flux qubit. Our method uses the noise sensitivity of a free-induction Ramsey interference experiment, comprising free evolution in the presence of noise for a fixed period of time followed by single-shot qubit-state measurement. Repeating this procedure enables Fourier-transform noise spectroscopy with access to frequencies up to the achievable repetition rate, a regime relevant to dephasing in ensemble-averaged time-domain measurements such as Ramsey interferometry. Rotating the qubit's quantization axis allows us to measure two types of noise: effective flux noise and effective critical-current or charge noise. For both noise sources, we observe that the very same 1/f-type power laws measured at considerably higher frequencies (0.2−20 MHz) are consistent with the noise in the 0.01−100-Hz range measured here. We find no evidence of temperature dependence of the noises over 65−200 mK, and also no evidence of time-domain correlations between the two noises. These methods and results are pertinent to the dephasing of all superconducting qubits. National Science Foundation (U.S.) (PHY-1005373) United States. Army Research Office (W911NF-12-1-0036) Japan Society for the Promotion of Science (FIRST Program) National Institute of Information and Communications Technology (Japan) Japan. Minstry of Education, Culture, Sports, Science and Technology 2012-07-24T17:30:46Z 2012-07-24T17:30:46Z 2012-05 2012-04 Article http://purl.org/eprint/type/JournalArticle 1098-0121 http://hdl.handle.net/1721.1/71784 Bylander, Jonas, David G. Cory, Simon Gustavsson, Khalil Harrabi, Yasunobu Nakamura, Terry P. Orlando, William D. Oliver, Jaw-Shen Tsai, Fei Yan, and Fumiki Yoshihara. "Spectroscopy of low-frequency noise and its temperature dependence in a superconducting qubit." Physical Review B 85 (2012): 174521-1 - 174521-10. URL: http://link.aps.org/doi/10.1103/PhysRevB.85.174521 Copyright 2012 American Physical Society https://orcid.org/0000-0002-7069-1025 https://orcid.org/0000-0002-4674-2806 https://orcid.org/0000-0002-4436-6886 en_US http://dx.doi.org/10.1103/PhysRevB.85.174521 Physical Review B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Orlando, Terry Philip Yan, Fei Bylander, Jonas Gustavsson, Simon Yoshihara, Fumiki Harrabi, Khalil Cory, David G. Nakamura, Yasunobu Tsai, Jaw-Shen Oliver, William D. Spectroscopy of low-frequency noise and its temperature dependence in a superconducting qubit |
| title | Spectroscopy of low-frequency noise and its temperature dependence in a superconducting qubit |
| title_full | Spectroscopy of low-frequency noise and its temperature dependence in a superconducting qubit |
| title_fullStr | Spectroscopy of low-frequency noise and its temperature dependence in a superconducting qubit |
| title_full_unstemmed | Spectroscopy of low-frequency noise and its temperature dependence in a superconducting qubit |
| title_short | Spectroscopy of low-frequency noise and its temperature dependence in a superconducting qubit |
| title_sort | spectroscopy of low frequency noise and its temperature dependence in a superconducting qubit |
| url | http://hdl.handle.net/1721.1/71784 https://orcid.org/0000-0002-7069-1025 https://orcid.org/0000-0002-4674-2806 https://orcid.org/0000-0002-4436-6886 |
| work_keys_str_mv | AT orlandoterryphilip spectroscopyoflowfrequencynoiseanditstemperaturedependenceinasuperconductingqubit AT yanfei spectroscopyoflowfrequencynoiseanditstemperaturedependenceinasuperconductingqubit AT bylanderjonas spectroscopyoflowfrequencynoiseanditstemperaturedependenceinasuperconductingqubit AT gustavssonsimon spectroscopyoflowfrequencynoiseanditstemperaturedependenceinasuperconductingqubit AT yoshiharafumiki spectroscopyoflowfrequencynoiseanditstemperaturedependenceinasuperconductingqubit AT harrabikhalil spectroscopyoflowfrequencynoiseanditstemperaturedependenceinasuperconductingqubit AT corydavidg spectroscopyoflowfrequencynoiseanditstemperaturedependenceinasuperconductingqubit AT nakamurayasunobu spectroscopyoflowfrequencynoiseanditstemperaturedependenceinasuperconductingqubit AT tsaijawshen spectroscopyoflowfrequencynoiseanditstemperaturedependenceinasuperconductingqubit AT oliverwilliamd spectroscopyoflowfrequencynoiseanditstemperaturedependenceinasuperconductingqubit |