A fluxonium qubit strongly coupled to a cavity enables Fock-state control and a flux-tunable Kerr nonlinearity that can be engineered to zero, a regime transmons cannot reach.
Depending on whether photon- number splitting is observable in the qubit spectrum, dif- ferent calibration methods were employed
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Fluxonium as a control qubit for bosonic quantum information
A fluxonium qubit strongly coupled to a cavity enables Fock-state control and a flux-tunable Kerr nonlinearity that can be engineered to zero, a regime transmons cannot reach.