Qudit-based quantum computing with SRF cavities at Fermilab

Conference · Wed Jan 24 04:00:00 EST 2024 · PoS

DOI:https://doi.org/10.22323/1.453.0127· OSTI ID:2318671

Roy, Tanay ^[1]; Kim, Taeyoon ^[2]; Romanenko, Alexander ^[1]; Grassellino, Anna ^[1]

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1. Fermilab
2. Fermilab; Northwestern U.

Superconducting radio frequency (SRF) cavities provide an excellent platform for storing quantum information as quantum $$d$$-level systems (qudits) due to their exceptionally long lifetimes and large accessible Hilbert spaces. A common strategy to manipulate the states is to use a nonlinear element like a transmon. There are, however, several challenges to building a 3D SRF architecture while maintaining a long cavity lifetime. We demonstrate our successful integration of transmons with single-cell Nb SRF cavities and the ability to prepare several non-classical states. Finally, we discuss our strategies to improve the coherence times, gate schemes, and extend the system for building a multi-qudit quantum processor.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 2318671
• Report Number(s): FERMILAB-CONF-24-0026-SQMS; oai:inspirehep.net:2751541
• Conference Information: Journal Name: PoS Journal Volume: LATTICE2023
• Country of Publication: United States
• Language: English