Driven Dynamics and Rotary Echo of a Qubit Tunably Coupled to a Harmonic Oscillator
Name
Gustavsson-2012-Driven Dynamics and Rotary Echo of a Qubit.pdf
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Author(s)
Gustavsson, Simon
Bylander, Jonas
Yan, Fei
Forn-Diaz, P.
Bolkhovsky, Vladimir
Braje, Danielle A.
Fitch, George L.
Harrabi, Khalil
Lennon, Donna M.
Miloshi, J.
Date Issued
April 2012
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Gustavsson, S. et al. “Driven Dynamics and Rotary Echo of a Qubit Tunably Coupled to a Harmonic Oscillator.” Physical Review Letters 108.17 (2012). © 2012 American Physical Society
Version
Final published version
Abstract
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.
MIT Department
Lincoln Laboratory
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.108.170503
