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Ultra-dispersive resonator readout of a quantum-dot qubit using longitudinal coupling
Published 11 Jul 2024 in cond-mat.mes-hall and quant-ph | (2407.08869v3)
Abstract: We perform readout of a quantum-dot hybrid qubit coupled to a superconducting resonator through a parametric, longitudinal interaction mechanism. Our experiments are performed with the qubit and resonator frequencies detuned by $\sim$10 GHz, demonstrating that longitudinal coupling can facilitate semiconductor qubit operation in the 'ultra-dispersive' regime of circuit quantum electrodynamics.
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