Stoica, Ovidiu Cristinel (2022) Counting 3dspaces: classicality and probability in standard and manyworlds quantum mechanics from quantumgravitational backgroundfreedom. [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 3dspace. That is, interference is not completely welldefined for states with different 3dspace geometries, even if their linear combination is.
The dissociation into 3dspace geometries still allows for interference at small scales, but precludes it at macro scales. It grants the possibility of classicallooking macroscopic objects, including measuring devices. Counting the 3dspace geometries automatically gives the Born rule.
But the wavefunction collapse turns out to be even more adhoc. Fortunately, the dissociation entails a kind of absolute decoherence, making the wavefunction collapse unnecessary. This naturally leads to a new version of the manyworlds interpretation, while solving some of its problems:
1) the classical3dspace states form an absolute preferred basis,
2) at any time, the resulting microbranches look like classical worlds, with objects in the 3dspace,
3) macrobranches stop interfering, even though microbranches can interfere,
4) the 3dspace geometries converge at the BigBang, favoring macrobranching 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 3dspace states, each of them counting as a world by having local beables (the 3dspace geometry and the classical fields),
7) the density of the classical3dspace states automatically obeys the Born rule.
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Item Type:  Preprint  

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Keywords:  Everett's manyworlds interpretation; Born rule; quantum gravity; backgroundindependence; manyspacetimes 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:  10 Oct 2022 13:21  
Last Modified:  10 Oct 2022 13:21  
Item ID:  21255  
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:  http://philsciarchive.pitt.edu/id/eprint/21255 
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Counting 3dspaces: classicality and probability in standard and manyworlds quantum mechanics from quantumgravitational backgroundfreedom. (deposited 18 Sep 2022 19:41)

Counting 3dspaces: classicality and probability in standard and manyworlds quantum mechanics from quantumgravitational backgroundfreedom. (deposited 07 Oct 2022 13:46)
 Counting 3dspaces: classicality and probability in standard and manyworlds quantum mechanics from quantumgravitational backgroundfreedom. (deposited 10 Oct 2022 13:21) [Currently Displayed]

Counting 3dspaces: classicality and probability in standard and manyworlds quantum mechanics from quantumgravitational backgroundfreedom. (deposited 07 Oct 2022 13:46)
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