  We demonstrate control and readout of a superconducting artificial atom based
on a transmon qubit using a compact lumped-element resonator. The resonator
consists of a parallel-plate capacitor (PPC) with a wire geometric inductor.
The footprint of the resonators is about 200 {\mu}m by 200 {\mu}m, which is
similar to the standard transmon size and one or two orders of magnitude more
compact in the occupied area comparing to coplanar waveguide resonators. We
observe coherent Rabi oscillations and obtain time-domain properties of the
transmon. The work opens a door to miniaturize essential components of
superconducting circuits and to further scaling up quantum systems with
superconducting transmons.
