506 citations · 2.2k across the 37 of their papers we have counts for
37 papers
Substrate insulated Josephson junctions for superconducting quantum circuits
U. Strobel, L. Radtke, L. Kamps +7
We have developed a fabrication technique for Josephson junctions that employs a three-dimensional patterned, low-loss substrate instead of commonly used organic resists. The techn…
Readout failures in superconducting qubits due to TLS-defects in tunnel junctions
J. Lisenfeld, A. K. Händel, A. Bilmes +1
Material defects give rise to parasitic two-level systems (TLS) which present a major source of decoherence in superconducting qubits. Here, we study a strongly coupled TLS that re…
Mapping the positions of Two-Level-Systems on the surface of a superconducting transmon qubit
Jürgen Lisenfeld, Alexander K. Händel, Etienne Daum +3
The coherence of superconducting quantum computers is severely limited by material defects that create parasitic two-level-systems (TLS). Progress is complicated by lacking underst…
Gradiometric, Fully Tunable C-Shunted Flux Qubits
Benedikt Berlitz, Alexander Konstantin Händel, Etienne Daum +2
Fully tunable flux qubits offer in-situ and independent controls of their energy potential asymmetry and tunnel barrier, making them versatile tools for quantum computation and the…
Investigation of Parasitic Two-Level Systems in Merged-Element Transmon Qubits
Etienne Daum, Benedikt Berlitz, Steffen Deck +2
In conventional transmon qubits, decoherence is dominated by a large number of parasitic two-level systems (TLS) residing at the edges of its large area coplanar shunt capacitor an…
Parasitic RF-SQUIDs in superconducting qubits due to wirebonds
B. Berlitz, E. Daum, S. Deck +2
Superconducting qubits show great promise to realize practical quantum computers from micro-fabricated integrated circuits. However, their solid-state architecture bears the burden…