Driven dynamics and rotary echo of a qubit tunably coupled to a harmonic oscillator
Journal article, 2012
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. © 2012 American Physical Society.
Author
S. Gustavsson
Massachusetts Institute of Technology (MIT)
Jonas Bylander
Massachusetts Institute of Technology (MIT)
F. Yan
Massachusetts Institute of Technology (MIT)
P. Forn-Díaz
California Institute of Technology (Caltech)
Massachusetts Institute of Technology (MIT)
V. Bolkhovsky
Massachusetts Institute of Technology (MIT)
D. Braje
Massachusetts Institute of Technology (MIT)
G. Fitch
Massachusetts Institute of Technology (MIT)
K. Harrabi
RIKEN
King Fahd University of Petroleum and Minerals
D. Lennon
Massachusetts Institute of Technology (MIT)
J. Miloshi
Massachusetts Institute of Technology (MIT)
P. Murphy
Massachusetts Institute of Technology (MIT)
R. Slattery
Massachusetts Institute of Technology (MIT)
S. Spector
Massachusetts Institute of Technology (MIT)
B. Turek
Johns Hopkins University
Massachusetts Institute of Technology (MIT)
T. Weir
Massachusetts Institute of Technology (MIT)
P.B. Welander
Massachusetts Institute of Technology (MIT)
F. Yoshihara
RIKEN
D.G. Cory
Perimeter Institute for Theoretical Physics
University of Waterloo
Y. Nakamura
University of Tokyo
NEC Laboratories Europe GmbH
RIKEN
T.P. Orlando
Massachusetts Institute of Technology (MIT)
W.D. Oliver
Massachusetts Institute of Technology (MIT)
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 108 17 170503-Subject Categories
Atom and Molecular Physics and Optics
Condensed Matter Physics
DOI
10.1103/PhysRevLett.108.170503