89 citations · 174 across the 9 of their papers we have counts for
9 papers
Electrical post-fabrication tuning of aluminum Josephson junctions at room temperature
Christian Križan, Maurizio Toselli, Irshad Ahmad +11
Josephson junctions are key elements of superconducting quantum technology, serving as the core building blocks of superconducting qubits. We present an experimental study on room-…
Quantum Acoustics with Tunable Nonlinearity in the Superstrong Coupling Regime
Marco Scigliuzzo, Léo Peyruchat, Riccardo Maria Marabini +4
Precise control of mechanical modes in the quantum regime is a key resource for quantum technologies, offering promising pathways for quantum sensing with macroscopic systems and s…
On-demand single-microwave-photon source in a superconducting circuit with wideband frequency tunability
Samarth Hawaldar, Siddhi Satish Khaire, Per Delsing +1
In this article, we propose a new method of generating single microwave photons in superconducting circuits. We theoretically show that pure single microwave photons can be generat…
A small footprint travelling-wave parametric amplifier with a high Signal-to-Noise Ratio improvement in a wide band
Hampus Renberg Nilsson, Liangyu Chen, Giovanna Tancredi +6
We characterise a small footprint travelling-wave parametric amplifier (TWPA). The TWPA is built with magnetically flux-tunable superconducting nonlinear asymmetric inductive eleme…
Mitigation of interfacial dielectric loss in aluminum-on-silicon superconducting qubits
Janka Biznárová, Amr Osman, Emil Rehnman +9
We demonstrate aluminum-on-silicon planar transmon qubits with time-averaged energy relaxation times of up to , corresponding to Q = 5 million, and a highest obs…
Peripheral circuits for ideal performance of a travelling-wave parametric amplifier
Hampus Renberg Nilsson, Daryoush Shiri, Robert Rehammar +2
We investigate the required peripheral circuits to enable ideal performance for a high-gain travelling-wave parametric amplifier (TWPA) based on three-wave mixing (3WM). By embeddi…
Simplified Josephson-junction fabrication process for reproducibly high-performance superconducting qubits
A. Osman, J. Simon, A. Bengtsson +6
We introduce a simplified fabrication technique for Josephson junctions and demonstrate superconducting Xmon qubits with relaxation times averaging above 50s (1.5$\ti…
Characterization of a multimode coplanar waveguide parametric amplifier
M. Simoen, C. W. S. Chang, P. Krantz +5
We characterize a novel Josephson parametric amplifier based on a flux-tunable quarter-wavelength resonator. The fundamental resonance frequency is ~1GHz, but we use higher modes o…
Direct observation of the thickness distribution of ultra thin AlOx barrier in Al/AlOx/Al Josephson junctions
L. J. Zeng, S. Nik, T. Greibe +3
We show that less than 10% of the barrier area dominates the electron tunneling in state-of-art Al/AlOx/Al Josephson junctions. They have been studied by transmission electron micr…