Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.170503
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Funding
- RIKEN
- KFUPM [DSR FT100009]
- U.S. Government
- Laboratory for Physical Sciences
- U.S. Army Research Office [W911NF-12-1-0036]
- National Science Foundation [PHY-1005373]
- Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST)
- NICT Commissioned Research
- MEXT
- Direct For Mathematical & Physical Scien
- Division Of Physics [1005373] Funding Source: National Science Foundation
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We have investigated the driven dynamics of a superconducting flux qubit that is tunably coupled to a microwave resonator. We find that the qubit experiences an oscillating field mediated by off-resonant driving of the resonator, leading to strong modifications of the qubit Rabi frequency. This opens an additional noise channel, and we find that low-frequency noise in the coupling parameter causes a reduction of the coherence time during driven evolution. The noise can be mitigated with the rotary-echo pulse sequence, which, for driven systems, is analogous to the Hahn-echo sequence.
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