scqubits.core.fluxonium

Classes

Fluxonium(EJ, EC, EL, flux, cutoff[, ...])

Class for the fluxonium qubit. Hamiltonian \(H_\text{fl}=-4E_\text{ C}\partial_\phi^2-E_\text{J}\cos(\phi+\varphi_\text{ext}) +\frac{1}{2}E_L\phi^2\) is represented in dense form. The employed basis is the EC-EL harmonic oscillator basis. The cosine term in the potential is handled via matrix exponentiation. Initialize with, for example::.