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With recent developments in high-precision quantum measurements, the questionof whether observations of decoherence from spacetime fluctuations areaccessible experimentally arises. Here we investigate the dynamics of boundstates interacting with an environment of gravitons under the Markovapproximation. The corresponding Lindblad master equation is presented thatenables gravitational decoherence and dissipation due to zero-point spacetimefluctuations to be analyzed. Specifically, we consider a one-dimensional cavityof massless scalar particles that models a light beam with negligible spinpolarizations being reflected between two free masses. Numerical simulationshave been performed to illustrate the wave-modal dependent decoherence anddissipation of such a configuration. We further demonstrate the existence ofnontrivial collective effects akin to superradiance, providing amplificationsof gravitational decoherence for a large number of identical bosonic particles.

Quantum dynamics of bound states under spacetime fluctuations