Quantum sensing for New Physics and Gravitational Waves

<!--HTML--><p>Feebly interacting new particles are predicted in a range of well-motivated scenarios beyond the Standard Model and can be candidates for Dark Matter. In order to make their effects detectable, novel approaches are in demand. I will present an overview of the use of quantum sensors for particle physics questions. In particular, I will show how atomic clocks as rapidly advancing quantum sensors constrain light new bosons and how they could be used for the detection of high-frequency gravitational waves.</p>