  A wide range of quantum sensing technologies are rapidly being integrated
into the experimental portfolio of the high energy physics community. Here we
focus on sensing with atomic interferometers; mechanical devices read out with
optical or microwave fields; precision spectroscopic methods with atomic,
nuclear, and molecular systems; and trapped atoms and ions. We give a variety
of detection targets relevant to particle physics for which these systems are
uniquely poised to contribute. This includes experiments at the precision
frontier like measurements of the electron dipole moment and electromagnetic
fine structure constant and searches for fifth forces and modifications of
Newton's law of gravity at micron-to-millimeter scales. It also includes
experiments relevant to the cosmic frontier, especially searches for
gravitional waves and a wide variety of dark matter candidates spanning heavy,
WIMP-scale, light, and ultra-light mass ranges. We emphasize here the need for
more developments both in sensor technology and integration into the broader
particle physics community.
