Extending the qubit coherence times is a crucial task in building quantum information processing devices. In the three-dimensional cavity implementations of circuit QED, the coherence of superconducting qubits was improved dramatically due to cutting the losses associated with the photon emission. Next frontier in improving the coherence includes the mitigation of the adverse effects of superconducting quasiparticles. In these lectures, we review the basics of the quasiparticles dynamics, their interaction with the qubit degree of freedom, their contribution to the qubit relaxation rates, and approaches to control their effect.
Cited by 3
Neuman et al., A phononic interface between a superconducting quantum processor and quantum networked spin memories
npj Quantum Inf 7, 121 (2021) [Crossref]
Siddiqi, Engineering high-coherence superconducting qubits
Nat Rev Mater 6, 875 (2021) [Crossref]
Farmer et al., Continuous real-time detection of quasiparticle trapping in aluminum nanobridge Josephson junctions
Appl. Phys. Lett. 119, 122601 (2021) [Crossref]
Authors / Affiliations: mappings to Contributors and OrganizationsSee all Organizations.
- Alexander von Humboldt-Stiftung / Alexander von Humboldt Foundation
- Army Research Office (ARO) (through Organization: United States Army Research Laboratory [ARL])
- United States Department of Energy [DOE]