New Paper “Tunable coupler to fully decouple and maximally localize superconducting qubits” Published in Physical Review Applied
We are happy to announce that our paper “Tunable coupler to fully decouple and maximally localize superconducting qubits” has been published in Physical Review Applied. In our paper, we derive conditions for tunable couplers to suppress all parasitic interactions, i.e. state delocalization and ZZ-crosstalk simultaneously. This is a desirable property, as the fidelity of 2-qubit gates in large quantum chips is significantly enhanced in this way. We also develop a coupler model for Transmons that meets these requirements and show numerically that the qubits decouple completely. Thus, the influence of spectator qubits on an adjacent qubit pair undergoing a gate sequence can be strongly suppressed, so that gate fidelities in an integrated system can be brought to the level of isolated 2 qubit gates.
For more information, find the paper at https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.20.064037