QUANTIN

Engineering materials and devices for solid-state quantum technologies requires a careful control of the interface quality between materials with different physical properties. Any disorder at these interfaces (defects, impurities, and roughness) is a detrimental source of noise and dissipation, and compromises the ability to generate, detect, and manipulate quantum states.

The QUANTIN project will explore novel material platforms for quantum devices with enhanced structural properties and device performance. To this end, QUANTIN will develop high quality interfaces between superconductor/semiconductor and superconductor/topological materials by performing the epitaxial growth in a high purity environment and down to cryogenic temperatures. Tin (Sn) will be used as superconductor due to combination of high critical temperature and resilience to high magnetic fields, thus outperforming widely used Aluminum superconducting contacts in quantum devices. QUANTIN will develop high quality epitaxial junctions between Sn and a variety of III-V, IV, V-VI materials that inherently possess either semiconductor or topological properties. Josephson junctions will be fabricated using these hybrid junctions to unveil the suitability of Sn-based gatemon devices for solid-state qubit manipulation. T

he results of QUANTIN will disrupt quantum hardware technologies and pave the way for novel device architectures with enhanced functionalities that will find applications in superconducting and topological quantum computing.