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| Home > Publications database > Loss Mechanisms and Quasiparticle Dynamics in Superconducting Microwave Resonators Made of Thin-Film Granular Aluminum > print |
| 001 | 851772 | ||
| 005 | 20210129235016.0 | ||
| 024 | 7 | _ | |a 10.1103/PhysRevLett.121.117001 |2 doi |
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| 100 | 1 | _ | |a Grünhaupt, Lukas |0 P:(DE-HGF)0 |b 0 |
| 245 | _ | _ | |a Loss Mechanisms and Quasiparticle Dynamics in Superconducting Microwave Resonators Made of Thin-Film Granular Aluminum |
| 260 | _ | _ | |a College Park, Md. |c 2018 |b APS |
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| 520 | _ | _ | |a Superconducting high kinetic inductance elements constitute a valuable resource for quantum circuit design and millimeter-wave detection. Granular aluminum (grAl) in the superconducting regime is a particularly interesting material since it has already shown a kinetic inductance in the range of nH/□ and its deposition is compatible with conventional Al/AlOx/Al Josephson junction fabrication. We characterize microwave resonators fabricated from grAl with a room temperature resistivity of 4×103 μΩ cm, which is a factor of 3 below the superconductor to insulator transition, showing a kinetic inductance fraction close to unity. The measured internal quality factors are on the order of Qi=105 in the single photon regime, and we demonstrate that nonequilibrium quasiparticles (QPs) constitute the dominant loss mechanism. We extract QP relaxation times in the range of 1 s and we observe QP bursts every ∼20 s. The current level of coherence of grAl resonators makes them attractive for integration in quantum devices, while it also evidences the need to reduce the density of nonequilibrium QPs. |
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| 700 | 1 | _ | |a Maleeva, Nataliya |0 P:(DE-HGF)0 |b 1 |
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| 700 | 1 | _ | |a Calvo, Martino |0 P:(DE-HGF)0 |b 3 |
| 700 | 1 | _ | |a Levy-Bertrand, Florence |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Ustinov, Alexey V. |0 P:(DE-HGF)0 |b 5 |
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| 700 | 1 | _ | |a Pop, Ioan M. |0 P:(DE-HGF)0 |b 9 |e Corresponding author |
| 773 | _ | _ | |a 10.1103/PhysRevLett.121.117001 |g Vol. 121, no. 11, p. 117001 |0 PERI:(DE-600)1472655-5 |n 11 |p 117001 |t Physical review letters |v 121 |y 2018 |x 1079-7114 |
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