  We propose a novel, exotic physics, modality in multi-messenger astronomy. We
are interested in a DIRECT detection of exotic fields emitted by the mergers.
This approach must be contrasted with the INDIRECT detection strategies, e.g.,
based on minute exotic-physics induced changes in gravitational wave spectral
features. While our strategy seems to be overly optimistic, the numbers do work
out. The numbers work out because of (i) the exquisite sensitivity of atomic
quantum sensors and because of (ii) the enormous amounts of energy released in
the mergers. Bursts of exotic fields may, for example, be produced during the
coalescence of black hole singularities, releasing quantum gravity messengers
per the title of this contribution. To be detectable by the precision atomic
sensors, such fields must be ultralight and ultra-relativistic and we refer to
them as exotic low-mass fields (ELFs). Since the fields are massive, the group
velocity of ELF bursts is smaller than the speed of light. Thereby the ELF
bursts lag behind the gravitational waves. Then LIGO or other gravitational
wave observatories would provide a trigger for networks of precision atomic
sensors that can listen for the feeble ELF signals. We characterize ELF
signatures in the sensors. ELFs would imprint a characteristic anti-chirp
signal across the sensor network. This contribution to Moriond-Gravity
proceedings summarizes salient points of our previous publication [Dailey et
al., Nature Astronomy 5, 150 (2021)]. I aim at a discussion that is informal
and accessible yet grounded in quantitative estimates.
