Fig. 1: Qubit geometry and measurement setup. | npj Quantum Information

Fig. 1: Qubit geometry and measurement setup.

From: Systematic improvements in transmon qubit coherence enabled by niobium surface encapsulation

Fig. 1

a 8 qubit chip layout consisting of three different geometries. b Low magnification annular dark field scanning transmission electron microscopy (ADF-STEM) image taken from a cross-section of a Nb transmon qubit where the Nb film is capped with a Ta metal layer. c Cryogenic wiring diagram. d, e Pulse scheme for characterization and plots. d Pulse for Rabi experiment used to calibrate π pulses. e Pulse for T1 experiment.

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