Journal article
Coherence and decay of higher energy levels of a superconducting transmon qubit
- Abstract:
- We present measurements of coherence and successive decay dynamics of higher energy levels of a superconducting transmon qubit. By applying consecutive π pulses for each sequential transition frequency, we excite the qubit from the ground state up to its fourth excited level and characterize the decay and coherence of each state. We find the decay to proceed mainly sequentially, with relaxation times in excess of 20 μs for all transitions. We also provide a direct measurement of the charge dispersion of these levels by analyzing beating patterns in Ramsey fringes. The results demonstrate the feasibility of using higher levels in transmon qubits for encoding quantum information.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 675.3KB, Terms of use)
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- Publisher copy:
- 10.1103/PhysRevLett.114.010501
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review Letters More from this journal
- Volume:
- 114
- Issue:
- 1
- Pages:
- 010501
- Publication date:
- 2015-01-06
- DOI:
- EISSN:
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1079-7114
- ISSN:
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0031-9007
- Language:
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English
- Keywords:
- Pubs id:
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pubs:505231
- UUID:
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uuid:089655cf-210f-490e-8cf7-80a2d39381a2
- Local pid:
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pubs:505231
- Source identifiers:
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505231
- Deposit date:
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2016-06-17
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- Copyright holder:
- American Physical Society
- Copyright date:
- 2015
- Notes:
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This is the
publisher's version of a journal article published by The American Physical Society in Physical Review Letters on 2015-01-06, available online: http://dx.doi.org/10.1103/PhysRevLett.114.010501
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