arXiv:2601.17384 · Physical Review A

The Universe as a Detector: A Quantum Filtering Formulation of the Diósi-Penrose Model

John Gough, Dylon Rees

quant-phgr-qcSubmitted Jan 24, 2026• Announced Jan 27, 2026• 0 citations

Abstract

We consider the Diósi-Penrose problem but rather than postulating background gravitational fluctuations, we instead 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

Journal reference: Phys. Rev. A 113, 042225, 28 April, 2026
DOI: 10.1103/945v-yvvk

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