Superfluid–Mott-insulator transition in superconducting circuits with weak anharmonicity
Superfluid–Mott-insulator transition in superconducting circuits with weak anharmonicity
We investigate theoretically the ground-state property of a two-dimensional array of superconducting circuits including the on-site superconducting qubits (SQs) with weak anharmonicity. In particular, we analyse the influence of this anharmonicity on the Mott insulator to superfluid quantum phase transition. The complete ground-state phase diagrams are presented under the mean …