Two massive bodies in a quantum state are like a pair of dancers who need to move in sync, but there's a noisy orchestra nearby. Each gravitational wave is a musician throwing them off rhythm. Scientists have figured out how this noise destroys quantum superposition — the ability of a particle to be in two places at once.

Previously, it was unclear how to describe this process mathematically because standard methods couldn't cleanly separate the system from its surroundings. The scientists applied a new approach — a coordinate redefinition that made the system's momentum depend only on its own observable quantities. It's as if the conductor rearranged the musicians so their sound wouldn't interfere with the dancers hearing each other.

The result was an equation showing that the rate of quantum state destruction is proportional to the square of the distance between masses. This means that increasing the distance not only enhances sensitivity to gravitational waves but also accelerates the loss of quantum coherence. Now scientists can estimate this effect in future experiments and better understand how gravity influences the quantum world.