The Importance of Quantum Gravity in the Early Universe

Nanograv is like all other currently available windows on gravitational waves, very, very deep into the classical regime. You're not looking at gravitational waves made by single atoms,. But there's a couple of caveats there that might be relevant. And you can imagine detecting something that you might call the echo of the Big Bang but it's only a poetic kind of phrase. If we did, it would be indirect evidence. It would not be immediately very useful, but it would be a clue to something and that would be very exciting indeed.