225 citations · 711 across the 12 of their papers we have counts for
12 papers
Three-mode tunable coupler for superconducting two-qubit gates
Elena Yu. Egorova, Alena S. Kazmina, Ilya A. Simakov +7
Building a scalable universal high-performance quantum processor is a formidable challenge. In particular, the problem of realizing fast high-perfomance two-qubit gates of high-fid…
Granular Aluminum kinetic inductance nonlinearity
M. Zhdanova, I. Pologov, G. Svyatsky +2
Granular Aluminum is a superconductor known for more than eighty years, which recently found its application in qubits, microwave detectors and compact resonators, due to its high…
Demonstration of a parity-time symmetry breaking phase transition using superconducting and trapped-ion qutrits
Alena S. Kazmina, Ilia V. Zalivako, Alexander S. Borisenko +21
Scalable quantum computers hold the promise to solve hard computational problems, such as prime factorization, combinatorial optimization, simulation of many-body physics, and quan…
Subgap kinetic inductance detector sensitive to 85-GHz radiation
F. Levy-Bertrand, A. Benoît, O. Bourrion +8
We have fabricated an array of subgap kinetic inductance detectors (SKIDs) made of granular aluminum (2~K) sensitive in the 80-90 GHz frequency band and operating at 300~m…
Non-degenerate parametric amplifiers based on dispersion engineered Josephson junction arrays
Patrick Winkel, Ivan Takmakov, Dennis Rieger +12
Determining the state of a qubit on a timescale much shorter than its relaxation time is an essential requirement for quantum information processing. With the aid of a new type of…
Electrodynamics of granular aluminum from superconductor to insulator: observation of collective superconducting modes
F. Levy-Bertrand, T. Klein, T. Grenet +14
We report on a detailed study of the optical response and phase diagram ( being the superconducting critical temperature and the normal state resistivity of the fi…
Interplay between kinetic inductance, non-linearity and quasiparticle dynamics in granular aluminum MKIDs
Francesco Valenti, Fábio Henriques, Gianluigi Catelani +13
Microwave kinetic inductance detectors (MKIDs) are thin film, cryogenic, superconducting resonators. Incident Cooper pair-breaking radiation increases their kinetic inductance, the…
Granular aluminum: A superconducting material for high impedance quantum circuits
Lukas Grünhaupt, Martin Spiecker, Daria Gusenkova +8
Superconducting quantum information processing machines are predominantly based on microwave circuits with relatively low characteristic impedance, of about 100 Ohm, and small anha…
Design of an inductively shunted transmon qubit with tunable transverse and longitudinal coupling
Susanne Richer
This thesis is set in the framework of superconducting transmon-type qubit architectures with special focus on two important types of coupling between qubits and harmonic resonator…
Quasiparticle dynamics in granular aluminum close to the superconductor to insulator transition
Lukas Grünhaupt, Nataliya Maleeva, Sebastian T. Skacel +7
Superconducting high kinetic inductance elements constitute a valuable resource for quantum circuit design and millimeter-wave detection. Granular aluminum (GrAl) in the supercondu…
Inductively shunted transmon qubit with tunable transverse and longitudinal coupling
Susanne Richer, Nataliya Maleeva, Sebastian T. Skacel +2
We present the design of an inductively shunted transmon qubit with flux-tunable coupling to an embedded harmonic mode. This circuit construction offers the possibility to flux-cho…
An argon ion beam milling process for native layers enabling coherent superconducting contacts
Lukas Grünhaupt, Uwe von Lüpke, Daria Gusenkova +8
We present an argon ion beam milling process to remove the native oxide layer forming on aluminum thin films due to their exposure to atmosphere in between lithographic steps. Our…