Tuning and amplifying the interactions in superconducting quantum circuits with subradiant qubits
Tuning and amplifying the interactions in superconducting quantum circuits with subradiant qubits
We propose a tunable coupler consisting of $N$ fixed-frequency qubits, which can tune and even amplify the effective interaction between two superconducting quantum circuits. The tuning range of the interaction is proportional to $N$, with a minimum value of zero and a maximum that can exceed the physical coupling rates …