On-Demand Dissipation for Qubit Reset and Leakage Removal in Superconducting Circuits

Superconducting quantum processors rely on controlled interactions between qubit and resonators in the circuit quantum electrodynamics (QED) architecture, exposing quantum devices to noise and dissipation. However, this dissipation can be used for quantum control, cooling, and error mitigation. 

We present a tunable dissipator coupled to a superconducting qubit-resonator system through a Purcell-filtered transmission line for entropy removal and error correction. Specifically, we demonstrate the use of a dissipator for qubit reset and leakage removal. Devices were fabricated and provided by the Superconducting Qubits at Lincoln Laboratory (SQUILL) Foundry at MIT Lincoln Laboratory, with funding from the Laboratory for Physical Sciences (LPS) Qubit Collaboratory.

Funding from the Defence Advanced Research Projects Agency under MeasQUIT Contract No. HR0011-24-9-0362.