168 citations · 656 across the 18 of their papers we have counts for
6 papers · 1 filter
Long-lived memory effects in the defect bath of superconducting qubits
Abhishek Agarwal, Masum Uddin, Shroya Vaidya +5
We reveal long-lived memory effects in the defect bath of a superconducting transmon qubit through electric-field tuning of two-level system (TLS) defects coupled to the qubit. Usi…
In-operando microwave scattering-parameter calibrated measurement of a Josephson travelling wave parametric amplifier
S. H. Shin, M. Stanley, W. N. Wong +5
Superconducting travelling wave parametric amplifiers (TWPAs) are broadband near-quantum limited microwave amplifiers commonly used for qubit readout and a wide range of other appl…
Coherent spin dynamics of rare-earth doped crystals in the high-cooperativity regime
Joseph Alexander, Gavin Dold, Oscar W. Kennedy +9
Rare-earth doped crystals have long coherence times and the potential to provide quantum interfaces between microwave and optical photons. Such applications benefit from a high coo…
Multiplexing Superconducting Qubit Circuit for Single Microwave Photon Generation
R E George, J Senior, O-P Saira +4
We report on a device that integrates eight superconducting transmon qubits in lambda/4 superconducting coplanar waveguide resonators fed from a common feedline. Using this multipl…
Direct identification of dilute surface spins on AlO: Origin of flux noise in quantum circuits
S. E. de Graaf, A. A. Adamyan, T. Lindström +4
It is universally accepted that noise and decoherence affecting the performance of superconducting quantum circuits are consistent with the presence of spurious two-level systems (…
Angular dependent micro-ESR characterization of a locally doped Gd3+:Al2O3 system
I. S. Wisby, S. E. de Graaf, R. Gwilliam +5
Interfacing rare-earth doped crystals with superconducting circuit architectures provides an attractive platform for quantum memory and transducer devices. Here we present the deta…