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Coherent Coupled Qubits for Quantum Annealing

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Academic year: 2021

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Figure

FIG. 1. Coupled-qubit geometry. (a) Device schematic. Qubit A (left loop) and qubit B (right loop) are capacitively shunted  three-junction flux qubits coupled through a shared inductance with a rf-SQUID coupler (center loop)
FIG. 3. Qubit-qubit coupling. Dashed black traces: Semiclassical model. Solid green traces: Simulations of the full-circuit Hamiltonian
FIG. 4. Qubit properties vs coupler bias. Results for qubit B, with f A ¼ 0 . Left column: Full range of coupler biases
Table I shows a list of sample parameters extracted from two different models of the coupled-qubit system — a semiclassical model, where the individual qubits and coupler are treated quantum mechanically but their interactions are treated as a classical mu
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