Quantum filtering formulation of the Diósi-Penrose model
Phys. Rev. A 113, 042225 – Published 28 April, 2026
DOI: https://doi.org/10.1103/945v-yvvk
Abstract
We consider the Diósi-Penrose problem but rather than postulating background gravitational fluctuations, we consider the quantum filter that arises from space-time homodyning the continuum of output quadrature described in the open quantum stochastic model presented here. This is described by a quantum Kushner-Stratonovich equation, typical of the form appearing in continuous-time collapse of the wave-function models in quantum decoherence theory.
