7 papers
Robust NbN on Si-SiGe hybrid superconducting-semiconducting microwave quantum circuit
Paniz Foshat, Samane Kalhor, Shima Poorgholam-khanjari +3
Advancing large-scale quantum computing requires superconducting circuits that combine long coherence times with compatibility with semiconductor technology. We investigate niobium…
On-chip microwave sensing of quasiparticles in tantalum superconducting circuits on silicon for scalable quantum technologies
Shima Poorgholam-Khanjari, Paniz Foshat, Mingqi Zhang +3
The performance and scalability of superconducting quantum circuits are fundamentally constrained by non-equilibrium quasiparticles, which induce microwave losses that limit resona…
Quasiparticle Dynamics in NbN Superconducting Microwave Resonators at Single Photon Regime
Paniz Foshat, Shima Poorgholam-khanjari, Valentino Seferai +7
Exchanging energy below the superconducting gap introduces quasiparticle energy distributions in superconducting quantum circuits, which will be responsible for their decoherence.…
Classical Interfaces for Controlling Cryogenic Quantum Computing Technologies
Jack C. Brennan, Joao Barbosa, Chong Li +8
Quantum processors have the potential to revolutionise computing on a scale unseen since the development of semiconductor technology in the middle of the 20th century. However, whi…
Engineering high-Q superconducting tantalum microwave coplanar waveguide resonators for compact coherent quantum circuits
Shima Poorgholam-Khanjari, Valentino Seferai, Paniz Foshat +5
Tantalum (Ta) has recently received considerable attention in manufacturing robust superconducting quantum circuits. Ta offers low microwave loss, high kinetic inductance compared…
RSFQ All-Digital Programmable Multi-Tone Generator For Quantum Applications
João Barbosa, Jack C. Brennan, Alessandro Casaburi +4
One of the most important and topical challenges of quantum circuits is their scalability. Rapid Single Flux Quantum (RSFQ) technology is at the forefront of replacing current stan…