Stochastic chaos and Markov blankets
In this treatment of random dynamical systems, we consider the existence—and identification—of conditional independencies at nonequilibrium steady-state. These independencies underwrite a particular partition of states, in which internal states are statistically secluded from external states by blan...
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| Main Authors: | , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
17 September 2021
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| In: |
Entropy
Year: 2021, Volume: 23, Issue: 9, Pages: 1-33 |
| ISSN: | 1099-4300 |
| DOI: | 10.3390/e23091220 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3390/e23091220 Verlag, lizenzpflichtig, Volltext: https://www.mdpi.com/1099-4300/23/9/1220 
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| Author Notes: | Karl Friston, Conor Heins, Kai Ueltzhöffer, Lancelot Da Costa and Thomas Parr |
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| 520 | |a In this treatment of random dynamical systems, we consider the existence—and identification—of conditional independencies at nonequilibrium steady-state. These independencies underwrite a particular partition of states, in which internal states are statistically secluded from external states by blanket states. The existence of such partitions has interesting implications for the information geometry of internal states. In brief, this geometry can be read as a physics of sentience, where internal states look as if they are inferring external states. However, the existence of such partitions—and the functional form of the underlying densities—have yet to be established. Here, using the Lorenz system as the basis of stochastic chaos, we leverage the Helmholtz decomposition—and polynomial expansions—to parameterise the steady-state density in terms of surprisal or self-information. We then show how Markov blankets can be identified—using the accompanying Hessian—to characterise the coupling between internal and external states in terms of a generalised synchrony or synchronisation of chaos. We conclude by suggesting that this kind of synchronisation may provide a mathematical basis for an elemental form of (autonomous or active) sentience in biology. | ||
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| 650 | 4 | |a information geometry | |
| 650 | 4 | |a Markov blanket | |
| 650 | 4 | |a thermodynamics | |
| 650 | 4 | |a variational inference | |
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| 700 | 1 | |a Parr, Thomas |e VerfasserIn |4 aut | |
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