109 citations · 433 across the 18 of their papers we have counts for
9 papers · 1 filter
Coulomb blockade in microscopic material defects as a source of decoherence and noise in solid-state quantum circuits
R. Banerjee, L. P. Lindoy, M. Hegedus +9
A critical limitation of solid-state quantum devices arises from the materials from which they are fabricated: uncontrolled surfaces, interfaces, and structural imperfections intro…
Phonon-bottlenecked spin relaxation of Er:CaWO at milliKelvin temperatures
S. Rajendran, B. Mistri, P. K. Sharma +5
We study spin-lattice relaxation times of electron spins in Er:CaWO at millikelvin temperature, detected via their coupling to a low-mode volume superconducting resonato…
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…
Scaling of self-stimulated spin echoes
Sebastian de Graaf, Aditya Jayaraman, Sergey Kubatkin +2
Self-stimulated echoes have recently been reported in the high cooperativity and inhomogeneous coupling regime of spin ensembles with superconducting resonators. In this work, we s…
Quantum bath suppression in a superconducting circuit by immersion cooling
M. Lucas, A. V. Danilov, L. V. Levitin +7
Quantum circuits interact with the environment via several temperature-dependent degrees of freedom. Yet, multiple experiments to-date have shown that most properties of supercondu…
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…
Tuneable on-demand single-photon source
Z. H. Peng, J. S. Tsai, O. V. Astafiev
An on-demand single photon source is a key element in a series of prospective quantum technologies and applications. We demonstrate the operation of a tuneable on-demand microwave…