24 citations · 68 across the 10 of their papers we have counts for
10 papers
Quantum solitons and their quantum walks in transmon arrays
Ben Blain, Giampiero Marchegiani, Luigi Amico +1
Superconducting qubits are artificial atoms whose spectra and interactions can be engineered through appropriate circuit design, a versatility that can be exploited for quantum sim…
Fraxonium: Fractional fluxon states for qudit encoding
Luca Chirolli, Valentina Brosco, Uri Vool +2
We propose a superconducting circuit hosting low-lying states, well separated from the rest of the spectrum, that naturally realizes a qudit system protected from leakage error…
Magnetic-Field and Temperature Limits of a Kinetic-Inductance Traveling-Wave Parametric Amplifier
Lucas M. Janssen, Farzad Faramarzi, Henry G. LeDuc +5
Kinetic-inductance traveling-wave parametric amplifiers (KI-TWPAs) offer broadband near-quantum-limited amplification with high saturation power. Due to the high critical magnetic…
Excess quasiparticles and their dynamics in the presence of subgap states
P. B. Fischer, G. Catelani
Material inhomogeneities in a superconductor generically lead to broadening of the density of states and to subgap states. The latter are associated with spatial fluctuations of th…
Nonequilibrium regimes for quasiparticles in superconducting qubits with gap-asymmetric junctions
G. Marchegiani, G. Catelani
Superconducting qubits hold promise for quantum computing, but their operation is challenged by various sources of noise, including excitations known as quasiparticles. Qubits with…
Quasiparticle effects in magnetic-field-resilient 3D transmons
J. Krause, G. Marchegiani, L. M. Janssen +3
Recent research shows that quasiparticle-induced decoherence of superconducting qubits depends on the superconducting-gap asymmetry originating from the different thicknesses of th…
Magnetic-field dependence of a Josephson traveling-wave parametric amplifier and integration into a high-field setup
L. M. Janssen, G. Butseraen, J. Krause +6
We investigate the effect of magnetic field on a photonic-crystal Josephson traveling-wave parametric amplifier (TWPA). We show that the observed change in photonic bandgap and pla…
Nonequilibrium quasiparticle distribution in superconducting resonators: effect of pair-breaking photons
P. B. Fischer, G. Catelani
Many superconducting devices rely on the finite gap in the excitation spectrum of a superconductor: thanks to this gap, at temperatures much smaller than the critical one the numbe…
Quasiparticle dynamics in a superconducting qubit irradiated by a localized infrared source
Rodrigo Benevides, Maxwell Drimmer, Giacomo Bisson +5
A known source of decoherence in superconducting qubits is the presence of broken Cooper pairs, or quasiparticles. These can be generated by high-energy radiation, either present i…
Proximity effect in normal-metal quasiparticle traps
A. Hosseinkhani, G. Catelani
In many superconducting devices, including qubits, quasiparticle excitations are detrimental. A normal metal () in contact with a superconductor () can trap these excitations…