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This paper aims to derive a fundamental mechanism of decoherence linked to gravitational nonlocality.

July 8, 2026Open Access

History-Dependent Gravity XVII: Gravitational Memory as the Origin of Quantum Decoherence and the Arrow of Time

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Randomized trial shows enhanced decoherence in cosmological settings, indicating a new understanding of quantum gravity.

This paper aims to derive a fundamental mechanism of decoherence linked to gravitational nonlocality.
Derived a decoherence mechanism from gravitational temporal nonlocality.
Identified the memory kernel with the two-point correlator of metric perturbations.
Analyzed cosmological observations to determine the effects on the primordial power spectrum.
Predicted scale-dependent suppression of the primordial power spectrum $ (k) \to \mathcal{P}(k) \exp(-\Lambda^2/k^2)$ with $ \Lambda \sim 10^{-3}\,\mathrm{Mpc}^{-1}$.
Found an effective infrared memory timescale $ \tau_* \sim 10^{-29.5}\,\mathrm{s}$, larger than the Planck time.
Provided a natural explanation for the large-angle power deficit in the CMB.

Alik Gimranov (2026) studied this question.

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