96 citations · 148 across the 8 of their papers we have counts for
8 papers
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-situ scanning gate imaging of individual two-level material defects in live superconducting quantum circuits
M. Hegedüs, R. Banerjee, A. Hutcheson +6
The low temperature physics of structurally amorphous materials is governed by two-level system defects (TLS), the exact origin and nature of which remain elusive despite decades o…
Loss and decoherence in superconducting circuits on silicon: Insights from electron spin resonance
Aditya Jayaraman, Andrey V. Danilov, Jonas Bylander +1
Solid-state devices used for quantum computation and quantum sensing applications are adversely affected by loss and noise caused by spurious, charged two-level systems (TLS) and s…
Spin echo silencing using a current-biased frequency-tunable resonator
V. Ranjan, Y. Wen, A. K. V. Keyser +5
The ability to control microwave emission from a spin ensemble is a requirement of several quantum memory protocols. Here, we demonstrate such ability by using a resonator whose fr…
Suppression of 1/f noise in solid state quantum devices by surface spin desorption
S. E. de Graaf, L. Faoro, J. Burnett +5
Noise and decoherence due to spurious two-level systems (TLS) located at material interfaces is a long-standing issue in solid state quantum technologies. Efforts to mitigate the e…
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…
Coupling of a locally implanted rare-earth ion ensemble to a superconducting micro-resonator
I. Wisby, S. E. de Graaf, R. Gwilliam +5
We demonstrate the coupling of rare-earth ions locally implanted in a substrate (Gd in AlO) to a superconducting NbN lumped-element micro-resonator. The hybrid d…
Effects of quasiparticle tunneling in a circuit-QED realization of a strongly driven two-level system
J. Leppäkangas, S. E. de Graaf, A. Adamyan +5
We experimentally and theoretically study the frequency shift of a driven cavity coupled to a superconducting charge qubit. In addition to previous studies, we here also consider d…