Berlin 2024 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
QI: Fachverband Quanteninformation
QI 19: Superconducting Electronics: Qubits I (joint session TT/QI)
QI 19.9: Vortrag
Mittwoch, 20. März 2024, 17:00–17:15, H 0104
Near quantum-limited amplification up to 1 T using granular aluminum — •Nicolas Zapata1, Ivan Takmakov1,2, Dennis Rieger1,2, Simon Günzler1,2, Ameya Nambisan1, Thomas Reisinger1, Wolfgang Wernsdorfer1,2, and Ioan Pop1,2 — 1IQMT, Karlsruhe Institute of Technology, 76131 Karslruhe, Germany — 2PHI, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
Josephson Junction based amplifiers have become essential components for the readout of microwave quantum circuits. Despite the advances made over the last decade, they still have limited applicability in systems that require high magnetic fields. The use of high kinetic inductance materials like granular Aluminum (grAl), opens the path for low noise amplification in Tesla fields thanks to their in-plane resilience [1] and negligible high order non-linearities [2], which is particularly attractive for the readout of semiconducting spin-qubits [3] and single molecular magnet qubits [4]. Here we present a non-degenerate parametric amplifier made of two coupled grAl resonators forming a Bose-Hubbard dimer [5, 6]. We report near quantum-limited 20 dB amplification, with an instantaneous bandwidth of few MHz and signal-to-pump detuning above 100 MHz, which was stable up to 1 T.
[1] K. Borisov et al., Appl. Phys. Lett. 117 (2020) 120502
[2] N. Maleeva et al., Nat. Commun. 9 (2018) 3889
[3] J. Stehlik et al., Phys. Rev. Appl. 4 (2015) 014018
[4] C. Godfrin et al., Phys. Rev. Lett. 119 (2017) 187702
[5] C. Eichler et al., Phys. Rev. Lett. 113 (2014) 110502
[6] P. Winkel, I. Takmakov et al., Phys. Rev. Appl. 13 (2020) 024015
Keywords: granular Aluminum; high kinetic inductance; superconducting parametric amplifiers; near quantum-limited amplifier; magnetic field resilience