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Quantum behavior of a flux qubit coupled to a resonator
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10.1063/1.3515520
/content/aip/journal/ltp/36/10/10.1063/1.3515520
http://aip.metastore.ingenta.com/content/aip/journal/ltp/36/10/10.1063/1.3515520
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Circuit of a qubit (denoted by the blue box) coupled to a transmission line resonator. (b) Equivalent circuit for an infinitesimal segment of length of the transmission line. (c) A flux qubit with 3 Josephson junctions.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Energy levels as functions of energy bias . The avoidance of level crossing is illustrated in the magnified inset. The parameters for this and the following figures are: , , and . (b) Contours of the energy difference versus bias and driver frequency . The green (lower) line is for and the black (upper) line is for . (c) Same as in (b), but within a very narrow vicinity of the resonator fundamental frequency .

Image of FIG. 3.
FIG. 3.

(Color online) Normalized transmission amplitude |t| as a function of the driving frequency detuning at (when ) for different values of the decay rates and (given in the figure in units of ), calculated using Eq. (46).

Image of FIG. 4.
FIG. 4.

(Color online) Normalized transmission amplitude |t| as a function of bias and driving frequency detuning , calculated using Eq. (46).

Image of FIG. 5.
FIG. 5.

(Color online) Normalized transmission amplitude |t| as a function of bias for calculated using Eq. (46) and obtained experimentally.

Image of FIG. 6.
FIG. 6.

(Color online) Normalized transmission amplitude |t| as a function of driving frequency detuning for (when ) for (a) , and (b) , , calculated by numerical solution of the master equation for several values of , given in units of .

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/content/aip/journal/ltp/36/10/10.1063/1.3515520
2010-12-10
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Quantum behavior of a flux qubit coupled to a resonator
http://aip.metastore.ingenta.com/content/aip/journal/ltp/36/10/10.1063/1.3515520
10.1063/1.3515520
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