Abstract
We present experiments on the driven dynamics of a two-level superconducting artificial atom. The driving strength reaches 4.78GHz, significantly exceeding the transition frequency of 2.288GHz. The observed dynamics is described in terms of quasienergies and quasienergy states, in agreement with Floquet theory. In addition, we observe the role of pulse shaping in the dynamics, as determined by nonadiabatic transitions between Floquet states, and we implement subnanosecond single-qubit operations. These results pave the way to quantum control using strong driving with applications in quantum technologies.
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