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Hartle, Ann

doi:10.1017/cbo9780511498169.001

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Measurability1

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2017

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“…There is a recent example [9] in which this issue comes very much to the fore. Consider one version of quantum gravity for closed cosmologies, formulated as a sum over histories.…”

Section: Measurabilitymentioning

confidence: 99%

Computability and Physical Theories

Geroch

Hartle

2017

Between Quantum and Cosmos

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The familiar theories of physics have the feature that the application of the theory to make predictions in specific circumstances can be done by means of an algorithm. We propose a more precise formulation of this feature -one based on the issue of whether or not the physically measurable numbers predicted by the theory are computable in the mathematical sense. Applying this formulation to one approach to a quantum theory of gravity, there are found indications that there may exist no such algorithms in this case. Finally, we discuss the issue of whether the existence of an algorithm to implement a theory should be adopted as a criterion for acceptable physical theories.

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“…There is a recent example [9] in which this issue comes very much to the fore. Consider one version of quantum gravity for closed cosmologies, formulated as a sum over histories.…”

Section: Measurabilitymentioning

confidence: 99%

Computability and Physical Theories

Geroch

Hartle

2017

Between Quantum and Cosmos

View full text Add to dashboard Cite

show abstract

Note on the Texts

Cited by 1 publication

References 75 publications

Computability and Physical Theories

Computability and Physical Theories

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