Quantum Sensors and applications in Fundamental Physics (1/4)

por Clara Murgui Galvez (CERN)

lunes 15 dic. 2025 9:30 → 11:30 Europe/Madrid

1001-Primera-1-1-1 - Paterna. Seminario (Universe)

In this course, we will explore how quantum sensors can be used to search for elusive interactions — including both wave-like and particle-like phenomena — that may evade conventional detectors that suffer  from energy thresholds. We will begin by introducing the concept of quantum sensors and discussing their advantages as ultra-low-threshold detectors compared to more traditional direct-detection experiments.

Next, we will focus on the two main classes of effects that quantum sensors can probe: (i) wave-like interactions, detectable through the modulation of fundamental constants or the sourcing of forces, and (ii) particle-like interactions, which we will approach through the physics of open quantum systems, including coherence and decoherence effects.

The course will conclude with a problem-solving session, where we will work through a set of exercises designed to consolidate, extend, and complement the material covered in the first three sessions.

-Lecture 1: Concept of quantum sensors, motivation and advantages with respect traditonal detectors.

-Lecture 2: Raman interferometry. Atomic clocks and atom interferometers. Observables and sensitivity.

-Lecture 3: Detecting wave-like interactions (e.g. ultralight dark matter <  10 eV). Types of effects (modulation of fundamental constants & new forces). Cavity searches. Spin observables.

-Lecture 4: Detecting particle-like interactions (e.g. sub-GeV dark matter). Open quantum system framework. One atom vs multi atom effects.