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Background freedom leads to many-worlds with local beables and probabilities

Stoica, Ovidiu Cristinel (2022) Background freedom leads to many-worlds with local beables and probabilities. [Preprint]

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Abstract

I argue that background freedom in quantum gravity automatically leads to a dissociation of the quantum state into states having a classical space. That is, interference is not completely well-defined for states with different space geometries, even if their linear combination is.
Interference of states with different space geometry is still allowed at small scales, but precluded at macro-scales. Macro-states, including measuring devices, appear classical.
The distribution of space geometries automatically gives the Born rule.
The dissociation entails a kind of absolute decoherence, making the ad-hoc wavefunction collapse unnecessary. This naturally leads to a new version of the many-worlds interpretation, in which:
1) the classical space-states form an absolute preferred basis,
2) at any time, the resulting micro-branches look like classical worlds, with objects in space,
3) macro-branches stop interfering, even though micro-branches can interfere (as they should),
4) the space geometries converge at the Big-Bang, favoring macro-branching towards the future,
5) the wavefunctional becomes real by absorbing the phases in the global U(1) gauge,
6) ontologically, the wavefunctional consists of many gauged space-states, each of them counting as a world by having local beables (the space geometry and the classical fields),
7) the density of the classical space-states automatically obeys the Born rule.


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Item Type: Preprint
Creators:
CreatorsEmailORCID
Stoica, Ovidiu Cristinelholotronix@gmail.com0000-0002-2765-1562
Keywords: Everett's many-worlds interpretation; Born rule; quantum gravity; background-independence; many-spacetimes interpretation
Subjects: Specific Sciences > Physics > Cosmology
General Issues > History of Philosophy of Science
Specific Sciences > Physics > Quantum Gravity
Specific Sciences > Physics > Quantum Field Theory
Specific Sciences > Physics > Quantum Mechanics
Depositing User: Ovidiu Cristinel Stoica
Date Deposited: 07 Nov 2022 14:43
Last Modified: 07 Nov 2022 14:43
Item ID: 21365
Subjects: Specific Sciences > Physics > Cosmology
General Issues > History of Philosophy of Science
Specific Sciences > Physics > Quantum Gravity
Specific Sciences > Physics > Quantum Field Theory
Specific Sciences > Physics > Quantum Mechanics
Date: 18 September 2022
URI: https://philsci-archive-dev.library.pitt.edu/id/eprint/21365

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