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    There is no logical necessity to quantize the gravitation... — Carmelics
    Home/Modality & Possibility
    HistoryEditSee Inverse

    There is no logical necessity to quantize the gravitational field.

    Modality & Possibility
    ?Rate how convincing each reason is below to see the overall strength.
    1 reason for
    2 reasons against

    Reasons For

    1 perspective
    Reason for
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    • 1.Earlier arguments attempted to show that coupling a classical gravitational field to quantum matter would allow violations of the uncertainty relations via measurements of the gravitational field.
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    • 2.All attempts to make this argument stick have so far failed.
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    Reasons Against

    2 perspectives
    Reason against 1 of 2
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    • 1.Consistency arguments show that superpositions of spacetime geometries—implied by quantum matter—require a quantum gravitational field to avoid ill-defined dynamics.
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    • 2.Penrose and Diósi independently argue that classical gravity coupled to quantum matter produces irreducible ambiguity in the stress-energy source term, forcing quantization.
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    • 3.If the gravitational field remains classical while sourced by quantum expectation values, the Schrödinger equation itself becomes nonlinear, violating well-confirmed quantum principles.
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    Reason against 2 of 2
    ?
    • 1.The failure of past arguments to demonstrate violations of uncertainty relations does not establish logical contingency—it may merely reflect the difficulty of constructing decisive thought experiments.
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    • 2.Absence of a successful proof-of-necessity is epistemically distinct from proof of logical non-necessity; the supporting argument conflates these by treating inconclusive results as positive modal evidence.
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    Topics

    Modality & Possibility

    Connections

    1 linked claim · 1 topic

    Skepticism1 linked
    There is no logical necessity demanding quantization of the gravitational field.

    Related

    Absence of a successful proof-of-necessity is epistemically distinct from proof ...All attempts to make this argument stick have so far failed.Consistency arguments show that superpositions of spacetime geometries—implied b...Earlier arguments attempted to show that coupling a classical gravitational fiel...
    +4 moreShow less
    If the gravitational field remains classical while sourced by quantum expectatio...Penrose and Diósi independently argue that classical gravity coupled to quantum ...The failure of past arguments to demonstrate violations of uncertainty relations...There is no logical necessity demanding quantization of the gravitational field.

    Similar

    There is no logical necessity demanding quantization of the gravitatio...98%The CMC approach is not viable as an approach to quantum gravity75%A classical gravitational field would not be constrained by the uncert...73%Earlier arguments attempted to show that coupling a classical gravitat...73%

    Source

    AI-extracted1/3 agreementValid
    SEP: quantum-gravity
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    In earlier research on quantum gravity it was often supposed that if there was at least one quantum field in the world together with the gravitational field, then given the universal coupling of the gravitational field, it must follow that the quantization of the one field somehow infects the gravitational field, implying that it must necessarily have quantum properties too. The arguments basically involve the consideration of a mass prepared in a superposition of position eigenstates. If the gr
    Extraction notes

    Validity: Extracted via Max plan + API grounding/validity checks

    Details

    Type
    claim
    Perspectives
    3 (1 for, 2 against)
    Edits
    1 edit