Print Email Facebook Twitter Approaching ultrastrong coupling in transmon circuit QED using a high-impedance resonator Title Approaching ultrastrong coupling in transmon circuit QED using a high-impedance resonator Author Bosman, S.J. (TU Delft QN/Steele Lab) Gely, M.F. (TU Delft QN/Steele Lab) Singh, Vibhor (Indian Institute of Science) Bothner, D. (TU Delft QN/Steele Lab) Castellanos-Gomez, Andres (Instituto de Ciencia de Materiales de Madrid (ICMM)) Steele, G.A. (TU Delft QN/Steele Lab) Date 2017-06-29 Abstract In this experiment, we couple a superconducting transmon qubit to a high-impedance 645Ω microwave resonator. Doing so leads to a large qubit-resonator coupling rate g, measured through a large vacuum Rabi splitting of 2g≃910 MHz. The coupling is a significant fraction of the qubit and resonator oscillation frequencies ω, placing our system close to the ultrastrong coupling regime (g=g/ω=0.071 on resonance). Combining this setup with a vacuum-gap transmon architecture shows the potential of reaching deep into the ultrastrong coupling g∼0.45 with transmon qubits. To reference this document use: http://resolver.tudelft.nl/uuid:8c9c9443-6eae-4e16-a6f6-c32936d1ae95 DOI https://doi.org/10.1103/PhysRevB.95.224515 ISSN 1098-0121 Source Physical Review B (Condensed Matter and Materials Physics), 95 (22) Part of collection Institutional Repository Document type journal article Rights © 2017 S.J. Bosman, M.F. Gely, Vibhor Singh, D. Bothner, Andres Castellanos-Gomez, G.A. Steele Files PDF PhysRevB.95.224515.pdf 726.72 KB Close viewer /islandora/object/uuid:8c9c9443-6eae-4e16-a6f6-c32936d1ae95/datastream/OBJ/view