  In this brief contribution I will highlight some directions where the
developments in the frontier of (quantum) metrology may be key for fundamental
high energy physics (HEP). I will focus on the detection of dark matter and
gravitational waves, and introduce ideas from atomic clocks and magnetometers,
large atomic interferometers and detection of small fields in electromagnetic
cavities. Far from being comprehensive, this contribution is an invitation to
everyone in the HEP and quantum technologies communities to explore this
fascinating topic.
