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

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Latest update

8/12/2022