Driven dynamics and rotary echo of a qubit tunably coupled to a harmonic oscillator

S. Gustavsson; J. Bylander; F. Yan; P. Forn-Díaz; V. Bolkhovsky; D. Braje; G. Fitch; K. Harrabi; D. Lennon; J. Miloshi; P. Murphy; R. Slattery; S. Spector; B. Turek; T. Weir; P. B. Welander; F. Yoshihara; D. G. Cory; Y. Nakamura; T. P. Orlando; W. D. Oliver

doi:10.1103/PhysRevLett.108.170503

Driven dynamics and rotary echo of a qubit tunably coupled to a harmonic oscillator

S. Gustavsson^*, J. Bylander, F. Yan, P. Forn-Díaz, V. Bolkhovsky, D. Braje, G. Fitch, K. Harrabi, D. Lennon, J. Miloshi, P. Murphy, R. Slattery, S. Spector, B. Turek, T. Weir, P. B. Welander, F. Yoshihara, D. G. Cory, Y. Nakamura, T. P. OrlandoW. D. Oliver

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

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.

Original language	English
Article number	170503
Journal	Physical Review Letters
Volume	108
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.108.170503
State	Published - 27 Apr 2012

ASJC Scopus subject areas

Physics and Astronomy (all)

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10.1103/PhysRevLett.108.170503

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Gustavsson, S., Bylander, J., Yan, F., Forn-Díaz, P., Bolkhovsky, V., Braje, D., Fitch, G., Harrabi, K., Lennon, D., Miloshi, J., Murphy, P., Slattery, R., Spector, S., Turek, B., Weir, T., Welander, P. B., Yoshihara, F., Cory, D. G., Nakamura, Y., ... Oliver, W. D. (2012). Driven dynamics and rotary echo of a qubit tunably coupled to a harmonic oscillator. Physical Review Letters, 108(17), Article 170503. https://doi.org/10.1103/PhysRevLett.108.170503

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title = "Driven dynamics and rotary echo of a qubit tunably coupled to a harmonic oscillator",

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.",

author = "S. Gustavsson and J. Bylander and F. Yan and P. Forn-D{\'i}az and V. Bolkhovsky and D. Braje and G. Fitch and K. Harrabi and D. Lennon and J. Miloshi and P. Murphy and R. Slattery and S. Spector and B. Turek and T. Weir and Welander, {P. B.} and F. Yoshihara and Cory, {D. G.} and Y. Nakamura and Orlando, {T. P.} and Oliver, {W. D.}",

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Gustavsson, S, Bylander, J, Yan, F, Forn-Díaz, P, Bolkhovsky, V, Braje, D, Fitch, G, Harrabi, K, Lennon, D, Miloshi, J, Murphy, P, Slattery, R, Spector, S, Turek, B, Weir, T, Welander, PB, Yoshihara, F, Cory, DG, Nakamura, Y, Orlando, TP & Oliver, WD 2012, 'Driven dynamics and rotary echo of a qubit tunably coupled to a harmonic oscillator', Physical Review Letters, vol. 108, no. 17, 170503. https://doi.org/10.1103/PhysRevLett.108.170503

TY - JOUR

T1 - Driven dynamics and rotary echo of a qubit tunably coupled to a harmonic oscillator

AU - Gustavsson, S.

AU - Bylander, J.

AU - Yan, F.

AU - Forn-Díaz, P.

AU - Bolkhovsky, V.

AU - Braje, D.

AU - Fitch, G.

AU - Harrabi, K.

AU - Lennon, D.

AU - Miloshi, J.

AU - Murphy, P.

AU - Slattery, R.

AU - Spector, S.

AU - Turek, B.

AU - Weir, T.

AU - Welander, P. B.

AU - Yoshihara, F.

AU - Cory, D. G.

AU - Nakamura, Y.

AU - Orlando, T. P.

AU - Oliver, W. D.

PY - 2012/4/27

Y1 - 2012/4/27

N2 - 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.

AB - 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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U2 - 10.1103/PhysRevLett.108.170503

DO - 10.1103/PhysRevLett.108.170503

M3 - Article

AN - SCOPUS:84860324855

SN - 0031-9007

VL - 108

JO - Physical Review Letters

JF - Physical Review Letters

IS - 17

M1 - 170503

ER -

Driven dynamics and rotary echo of a qubit tunably coupled to a harmonic oscillator

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