Gravitational Wave Backgrounds from Colliding ECOs

Understand

Long baseline atom interferometers offer an exciting opportunity to explore mid-frequency gravitational waves.

• In this work we survey the landscape of possible contributions to the total 'gravitational wave background' in this frequency band and advocate for targeting this observable.
• Such an approach is complimentary to searches for resolved mergers from individual sources and may have much to reveal about the Universe.
• We find that the inspiral phases of stellar-mass compact binaries cumulatively produce a signal well within reach of the proposed AION-km and AEDGE experiments.