Coherent Control of a Superconducting Qubit with Dynamically Tunable Qubit-cavity Coupling

Details Coherent Control of a Superconducting Qubit with Dynamically Tunable Qubit-cavity Coupling Coherent Control of a Superconducting Qubit with Dynamically Tunable Qubit-cavity Coupling

2011-08-12

arxiv.org/abs/1108.2705v1

Phys. Rev. B 84, 184515 (2011)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.84.184515

We demonstrate coherent control and measurement of a superconducting qubit coupled to a superconducting coplanar waveguide resonator with a dynamically tunable qubit-cavity coupling strength. Rabi oscillations are measured for several coupling strengths showing that the qubit transition can be turned off by a factor of more than 1500. We show how the qubit can still be accessed in the off state via fast flux pulses. We perform pulse delay measurements with synchronized fast flux pulses on the device and observe $T_1$ and $T_2$ times of 1.6 and 1.9 $\mu$s, respectively. This work demonstrates how this qubit can be incorporated into quantum computing architectures.

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