Granular aluminum – a versatile material for superconducting detectors and quantum circuits

23 Jul 2019, 10:45
15m
Auditorium G. Testori (Milano)

Auditorium G. Testori

Milano

Piazza Città di Lombardia, 1, 20124 Milano MI
Invited Presentation Low Temperature Detector for quantum technologies and other frontiers Orals LM 005

Speaker

Lukas Grünhaupt (Karlsruhe Institute of Technology)

Description

Granular aluminum is an intriguing superconducting material, which has recently been receiving increasing attention in the superconducting quantum bits (qubits) and detectors communities. Among its key features are a tunable kinetic inductance up to nH/sq, amenable nonlinearity, and low microwave frequency losses [1,2,3]. Furthermore, quasiparticle relaxation times on the order of ~s have been recently observed [1].
We will present our recent results on granular aluminum quantum circuits [4], and discuss how superconducting qubits combined with fast readout electronics could be utilized as ultra-sensitive low temperature detectors.

[1] L. Grünhaupt et. al, Phys. Rev. Lett. 121, 117001 (2018)
[2] N. Maleeva et al., Nat. Commun. 9, 3889 (2018)
[3] F. Valenti et al., Phys. Rev. Appl. (in press), Preprint at: http://arxiv.org/abs/1810.12341
[4] L. Grünhaupt & M. Spiecker et al., Nat. Mater. (in press), Preprint at: http://arxiv.org/abs/1809.10646

Less than 5 years of experience since completion of Ph.D Y
Student (Ph.D., M.Sc. or B.Sc.) N

Primary authors

Lukas Grünhaupt (Karlsruhe Institute of Technology) Dr Ioan M. Pop (Karlsruhe Institute of Technology)

Presentation Materials