Non-quantized gravity models that preserve Galilean invariance and reproduce Newtonian interaction on average require a minimal noise injection to remain non-entangling.
A postquantum theory of classical gravity?
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Decoherence with a hidden environment in fully quantum systems produces effective non-Markovian classical-quantum dynamics, valid when the semi-Wigner operator remains positive semidefinite, reducing to Markovian CQ models in the short-memory limit.
Postquantum classical gravity requires stochastic spacetime fluctuations consisting of a diffusing spin-2 field and spin-0 scalar whose noise is constrained by LISA Pathfinder and decoherence bounds.
citing papers explorer
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Minimal noise in non-quantized gravity
Non-quantized gravity models that preserve Galilean invariance and reproduce Newtonian interaction on average require a minimal noise injection to remain non-entangling.
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Emergence of Non-Markovian Classical-Quantum Dynamics from Decoherence
Decoherence with a hidden environment in fully quantum systems produces effective non-Markovian classical-quantum dynamics, valid when the semi-Wigner operator remains positive semidefinite, reducing to Markovian CQ models in the short-memory limit.
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Stochastic modes in postquantum classical gravity
Postquantum classical gravity requires stochastic spacetime fluctuations consisting of a diffusing spin-2 field and spin-0 scalar whose noise is constrained by LISA Pathfinder and decoherence bounds.