2 articles
Noise kernel
The noise kernel is the symmetrized two-point correlation function of a quantum field's stress-energy tensor, serving as the stochastic source in the Einstein-Langevin equation of stochastic gravity.
Stochastic gravity
Stochastic gravity is the extension of semiclassical gravity that adds stress-energy fluctuations as metric noise via the Einstein–Langevin equation, developed mainly in the 1990s by Enric Verdaguer and Bei-Lok Hu.