Noise and decoherence induced by gravitons

Understand

We study quantum noise and decoherence induced by gravitons.

• We derive a Langevin equation of geodesic deviation in the presence of gravitons.
• The amplitude of noise correlations tells us that large squeezing is necessary to detect the noise.
• We also consider the decoherence of spatial superpositions of two massive particles caused by gravitons in the vacuum state and find that gravitons could give a relevant contribution to the decoherence.