Dresden 2026 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 11: Implementations IV
QI 11.2: Vortrag
Mittwoch, 11. März 2026, 10:00–10:15, BEY/0245
Double-pumped Bogoliubov parametric amplifier using a superconducting Bose-Hubbard dimer — •Najmeh Etehadi Abari1, Nicolas Zapata1, Ioan Pop1,2, and Anja Metelmann1,3 — 1Institute for Quantum Materials and Technology, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany — 2Physics Institute 1, Stuttgart University, 70569, Stuttgart, Germany — 3Institut de Sciences et d'Ingénierie Supramoléculaires,(ISIS, UMR7006), University of Strasbourg and CNRS, 67000 Strasbourg, France
Quantum limited standing-wave amplifiers in superconducting circuits are key tools for quantum-device readout, relying on Josephson junction or high kinetic inductance nonlinearities to convert pump energy into signal gain[1,2]. However, their performance is typically limited by operation near dynamic instability, restricting bandwidth. We discuss a class of standing-wave parametric amplifiers known as Bogoliubov amplifiers [3], which leverage double-pump drives to operate far from the instability region, thereby overcoming the intrinsic gain-bandwidth limitation. We demonstrate this concept on a Bose-Hubbard dimer formed by two coupled Kerr resonators [4], showing that double-pump driving enables tunable gain, bandwidth, and noise performance. This establishes Bogoliubov amplifiers as a promising platform for scalable qubit readout and precision quantum measurements. [1] P. Winkel, et al., Phys. Rev. Appl. 13.2 (2020). [2] D. J. Parker, et al., Phys. Rev. Appl. 17.3 (2022). [3] A. Metelmann, et al., arXiv:2208.00024 (2022). [4] N. Zapata, et al., Phys. Rev. Lett. 133. 26 (2024).
Keywords: Superconduncting sanding-wave amplifiers; Quantum limited amplifiers; Bogoliubov amplifiers; Broader bandwidth; Bose-Hubbard dimer