Event Details

Dr Connolly is a lecturer at Imperial College London and PI of the Quantum Science and Device Facility (QSDF) since 2019.

Abstract:-

Nanostructured low-dimensional semiconductors are an exciting sandpit for exploring fundamental ideas in condensed matter physics and could potentially enable next-generation quantum devices. Superconducting quantum circuits integrated with mesoscopic semiconductor Josephson junctions have recently emerged as a particularly versatile platform for realising qubits with gate voltage-controlled properties, and for studying interactions between quasiparticle excitations and microwave light. In this talk I summarise progress towards realising these experiments with V-VI topological insulators and III-V 2D electron gases [1,2]. I will also outline the main challenges with using super-semi materials to realise topological superconductivity in the presence of disorder and strong global magnetic fields, and describe some possible routes forward enabled by incorporating local magnetism [3].

[1] T. Schmitt, et al., Nano Lett. 22(7), 2595 (2022)

[2] V. Chidambaram, et al., Phys. Rev. Research 4, 023170 (2022)

[3] D. Burke et al., Phys. Rev. B 109, 045138 (2024)