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Tensor-network simulation of strongly coupled multi-fluxonium circuits
Christian Hensel, Andrés N. Cáliz, Pau Torrente +2
Designing a superconducting quantum processor rests on predicting the low-lying spectrum of its coupled circuit. The Hilbert-space dimension of the circuit's lumped-element model g…
Three-Josephson Junctions Flux Qubit Couplings
María Hita-Pérez, Gabriel Jaumà, Manuel Pino +1
We analyze the coupling of two flux qubits with a general many-body projector into the low-energy subspace. Specifically, we extract the effective Hamiltonians that controls the dy…
Ultrastrong capacitive coupling of flux qubits
María Hita-Pérez, Gabriel Jaumà, Manuel Pino +1
A flux qubit can interact strongly when it is capacitively coupled to other circuit elements. This interaction can be separated in two parts, one acting on the qubit subspaces and…