Date/Time
Date(s) - 11/03/2026
10:30 am - 11:30 am

BSB 108

Dr. Asimina Arvanitaki
Research Faculty and Perimeter Research Chair
Perimeter Institute
Profile link: https://perimeterinstitute.ca/people/asimina-arvanitaki

TITLE: Superradiant interactions of cosmic relics

ABSTRACT:

Cosmic relics such as the cosmic neutrino background (C?B) are among the most compelling predictions of modern cosmology, yet they remain undetected because their interactions with ordinary matter are extraordinarily weak — a 10-cm detector would expect far less than one event over the age of the universe. I will describe a new approach in which macroscopic targets, such as spin ensembles familiar from NMR, prepared in easy to achieve quantum states can respond collectively to these tiny signals. In this regime, interactions are superradiantly enhanced, with rates scaling as the square of the number of particles in the target, boosting relic neutrino signals to the Hz level.

I will discuss the broader implications for detecting relic neutrinos, axion and dark-photon dark matter, and explain why neutron beams incident on tabletop systems based on NMR techniques provide a natural testing ground. Finally, I will argue that these interactions appear not as conventional energy deposits but as correlated noise, pointing toward new detection strategies rooted in quantum measurement science.