Hybrid Quantum Wave Circulation

Objective

The circulator, a cornerstone in communication and radar engineering, has gained importance in quantum technologies, becoming essential for reading out superconducting qubits. Q-Wave (Hybrid Quantum Wave Circulation) aims to transform current 3D cryogenic circulators into 2D devices, free of permanent magnets. This new generation of circulators can be integrated on-chip, close to the quantum processor, therefore contributing to the scalability of superconducting quantum computers. The realization of such devices would mean an important reduction of the volume of critical raw materials or less efficient alternative solutions, in agreement with the objectives of the European Green Deal and the Sustainable Development Goals. Q-Wave’s sub-goals are: O1) design tuneable superconducting (SC) resonators; O2) study magnon-photon interactions in magnetic vortices; O3) develop on-chip circulators compatible with magnetic field operation; O4) develop self-biased on-chip circulators without external magnetic field compatible with SC circuits. For that, the project combines complementary unique abilities in hybrid systems (Associated Partner, AP, EPFL, Switzerland); quantum magnonics (Host Institution, HI, CSIC, Spain); CMOS (Complementary Metal-Oxide-Semiconductor) and SC circuits (fellow) and classic magnonics (secondment, University of Vienna, Austria).