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Experimental Particle and Astro-Particle Physics Seminar
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Europe/Zurich
Description
Abstract:
Superconducting quantum sensors have the potential to open up new exciting avenues of fundamental scientific exploration that require sensitivity to rare and tiny particle interactions (Dark Matter, Beyond Standard Model Neutrino interactions , Cosmic Axion Backgroun, etc). Unfortunately, modern day qubits for computation already have measured excess quasi-particle excitations at the qubit junction which have been recently tied to environmental mm wave photon leakage and substrate non-ionizing phonon bursts of unknown origin. As we transform computational qubits into quantum sensors by strongly coupling them to the environment, we expect that these backgrounds will increase by many orders of magnitude, making current day superconducting quantum sensing technology unusable for many applications.
Perhaps unsurprisingly, these very same backgrounds plague superconducting transition edge sensor based superconducting calorimeters for light mass dark matter for the last decade and recent studies with these devices have opened up a powerful complementary path to understanding the source of the background events.