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    Made withinDC&Austin
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    Home/Original/inverse
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    Inverse View

    It is not the case that Localised wave packets do not follow exact Newtonian trajectories because decoherence causes them to fan out into new more localised packets

    ?Set your confidence on the premises below to see your aggregate.

    Reasons For

    1 perspective
    Reason for
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    • 1.A localised wave packet, once sufficiently spread, is decohered into new more localised packets
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    • 2.This decoherence produces a collective 'fanning out' of trajectories
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    • 3.Deviations from Newtonian behaviour arise both from the tendency of individual components to spread and from the localising effect of environmental interaction
      ?

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    Reasons Against

    2 perspectives
    Reason against 1 of 2
    ?
    • 1.Zurek's 'einselection' framework demonstrates that environmental monitoring selects pointer states, actively preventing the clean propagation of any single Newtonian trajectory.
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    • 2.The preferred pointer basis is determined by interaction Hamiltonians, not by pre-existing classical paths, so decoherence constitutively shapes rather than merely disrupts trajectories.
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    • 3.Because einselection continuously regenerates localisation through branching rather than preserving it, the resulting ensemble of packets structurally deviates from any single Newtonian geodesic.
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    Reason against 2 of 2
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    • 1.Joos and Zeh (1985) showed that macroscopic superpositions suppress coherence on timescales far shorter than dynamical evolution, meaning momentum uncertainty accumulates before Newtonian forces dominate.
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    • 2.Heisenberg's uncertainty principle entails that each environmentally localised packet carries irreducible momentum spread, so the fan of successor packets collectively explores a wider phase-space volume than Newton predicts.
      ?

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