Active Resonator Reset in the Nonlinear Dispersive Regime of Circuit QED

Abstract

Do you want the job done right, or do you want it done fast? No matter the platform, processors based on circuit quantum electrodynamics can require a significant wait after measurement, to allow leftover photons to exit the readout resonators. The authors demonstrate two methods that minimize dead time, even when a resonator is driven $n\phantom{\rule{0}{0ex}}o\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}l\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}e\phantom{\rule{0}{0ex}}a\phantom{\rule{0}{0ex}}r\phantom{\rule{0}{0ex}}l\phantom{\rule{0}{0ex}}y$. This reduces the buildup of errors in an error-correction cycle, so we can enjoy speed $a\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}d$ accuracy in quantum computing.