A scanning high-Q superconducting resonator can couple coherently to transmon qubits and read out their spectra and coherence times without fabricating on-chip readout circuitry.
Atomic layer deposition of titanium nitride for quantum circuits
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
abstract
Superconducting thin films with high intrinsic kinetic inductance are of great importance for photon detectors, achieving strong coupling in hybrid systems, and protected qubits. We report on the performance of titanium nitride resonators, patterned on thin films (9-110 nm) grown by atomic layer deposition, with sheet inductances of up to 234 pH/square. For films thicker than 14 nm, quality factors measured in the quantum regime range from 0.4 to 1.0 million and are likely limited by dielectric two-level systems. Additionally, we show characteristic impedances up to 28 kOhm, with no significant degradation of the internal quality factor as the impedance increases. These high impedances correspond to an increased single photon coupling strength of 24 times compared to a 50 Ohm resonator, transformative for hybrid quantum systems and quantum sensing.
citation-role summary
background 1
citation-polarity summary
fields
quant-ph 1years
2025 1verdicts
CONDITIONAL 1roles
background 1polarities
background 1representative citing papers
citing papers explorer
-
A scanning resonator for probing quantum coherent devices
A scanning high-Q superconducting resonator can couple coherently to transmon qubits and read out their spectra and coherence times without fabricating on-chip readout circuitry.