Real-time feedback control of a mesoscopic superposition
Kurt Jacobs, Justin Finn, Sai Vinjanampathy
TL;DR
This paper demonstrates how continuous real-time feedback, combined with simultaneous measurements, can effectively track, control, and preserve mesoscopic superpositions in nanomechanical and superconducting resonators.
Contribution
It introduces a feedback protocol utilizing an approximate state-estimator and dual measurements for mesoscopic superposition control.
Findings
Effective real-time feedback stabilizes superpositions.
Dual measurement scheme enables precise state estimation.
Applicable to nanomechanical and superconducting systems.
Abstract
We show that continuous real-time feedback can be used to track, control, and protect a mesoscopic superposition of two spatially separated wave-packets. The feedback protocol is enabled by an approximate state-estimator, and requires two continuous measurements, performed simultaneously. For nanomechanical and superconducting resonators, both measurements can be implemented by coupling the resonators to superconducting qubits.
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