| AVS 65th International Symposium & Exhibition | |
| Materials and Processes for Quantum Computing Focus Topic | Tuesday Sessions |
| Session MP+EM+NS-TuM |
| Session: | High Coherence Qubits for Quantum Computing |
| Presenter: | Sam Stanwyck, Rigetti Computing |
| Correspondent: | Click to Email |
The depth of the circuit a quantum computer can perform depends directly on the coherence times of its qubits. There are many sources of decoherence in superconducting qubits, and identifying and minimizing dominant sources is a critical step in improving the performance of quantum computers. By measuring the internal quality factor of resonators and deliberately coupling to different loss mechanisms, we identify dominant sources of resonator loss in our systems, as well fabrication process changes to ameliorate these losses. Additionally, defects and materials present on the chip surface are correlated with process changes and coherence metrics.