Shortcuts to Adiabaticity for Fast Qubit Readout in Circuit Quantum Electrodynamics
arXiv:2201.06007 · doi:10.1103/PhysRevApplied.18.034010
Abstract
We propose how to engineer the longitudinal coupling to accelerate the measurement of a qubit longitudinally coupled to a cavity, motivated by the concept of shortcuts to adiabaticity. Different modulations are inversely designed from two methods of inverse engineering and counter-diabatic driving, for achieving larger values of the signal-to-noise ratio (SNR) at nanosecond scale. By comparison, we demonstrate that our protocols outperform the usual periodic modulations on the pointer state separation and SNR. Finally, we show a possible implementation considering state-of-the-art circuit quantum electrodynamics architecture, estimating the minimal time allowed for the measurement process.
arXiv comment6 pages, 6 figures
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