NPA Seminar, Wouter van de Pontseele, MIT, “Quantum technologies for neutrino measurements”

Event time: 
Friday, May 12, 2023 - 1:00pm to 2:00pm
Wright Lab, WL-216 (Conference Room) See map
272 Whitney Avenue
New Haven, CT 06511

Event description: 

Superconducting technologies have been developed and employed with great success by the quantum information science community. More and more, these technologies show promise for fundamental physics. I want to sketch some of their possible advantages in the context of the Ricochet and Project 8 neutrino experiments.
The Ricochet experiment aims to detect coherent elastic neutrino-nucleus scattering at the nuclear research reactor in Grenoble, France. The experiment will start data-taking in 2024 with two complementary detector technologies, both employing cryogenic calorimeters. One of the two detector technologies envisaged by Ricochet has a target mass consisting of superconducting crystals.
When a neutrino interacts coherently with a nucleus in a superconducting crystal lattice, the recoil energy produces phonons and excites cooper pairs into Bogoliubov quasiparticles. The milli-electronvolt-scale bandgap of superconductors might enable a significantly lower nuclear recoil energy threshold.
To sense the energy in the phonon and quasiparticle systems, a trapping and thermalisation layer is connected with transition edge sensors for ultra-sensitive heat to current conversion. Several detectors are envisaged to be frequency multiplexed into the microwave band at cryogenic temperatures using SQUIDs and resonators.
Finally, I will touch upon the development of Travelling Wave Parametric Amplifiers (TWPA) at MIT, a class of quantum-limited amplifiers appropriate for broadband microwave amplification that could suit both Project 8 and Ricochet.