Demonstrating a Driven Reset Protocol of a Superconducting Qubit
  Qubit reset is crucial at the start of and during quantum information algorithms. We present the experimental demonstration of a practical method to force qubits into their ground state, based on driving certain qubit and cavity transitions. Our protocol, called the double drive reset of population is tested on a superconducting transmon qubit in a three-dimensional cavity. Using a new method for measuring population, we show that we can prepare the ground state with a fidelity of at least 99.5 % in less than 3 microseconds; faster times and higher fidelity are predicted upon parameter optimization. 
K. Geerlings, Z. Leghtas, I. M. Pop, S. Shankar, L. Frunzio, R. J.   Schoelkopf, M. Mirrahimi, M. H. Devoret
cond-mat.mes-hall quant-ph