Historical research guide · 1067 · 2005
Gravity and the quantum vacuum inertia hypothesis
Alfonso Rueda · Bernard Haisch
In one minute
Alfonso Rueda and Bernard Haisch extend their quantum-vacuum inertia hypothesis from acceleration to weight. In their model, an accelerating object sees a horizon-related asymmetry in the electromagnetic zero-point field; the reaction to that asymmetry is inertia. They apply local Lorentz invariance to a stone held above Earth: freely falling local frames stream past the stationary stone, so the proposed vacuum reaction appears as weight. The paper identifies inertial and passive gravitational mass through the same interaction, derives a radial inverse-square field in the weak-field argument and proposes a test. A cold conducting microwave cavity should weigh slightly more when assembled than the sum of its parts because of its resonant zero-point modes. The authors present this as a model with an experimental design; they leave active gravitational mass and non-electromagnetic vacuum fields unresolved.
Connection
Chapter 3 rests on the claim that inertia and gravity are effects of the vacuum rather than innate properties of matter, and this is the paper that carries the claim across from inertia to weight — and shows it sitting inside general relativity rather than against it. Chapter 2 gets the rarer prize: a laboratory measurement with no free parameters whose outcome would say whether the zero-point field is a real energy or only a bookkeeping device.
From the source
The starting result is that the electromagnetic quantum vacuum contributes to inertial mass. Computed in a Rindler frame — a rigid frame in uniformly accelerated motion — the zero-point radiation acquires an event-horizon asymmetry that exerts a force opposing the acceleration, proportional to the acceleration in the low-velocity limit and vanishing identically in constant-velocity frames because the zero-point spectrum is Lorentz invariant. The authors name the whole construction the quantum vacuum inertia hypothesis.Section 1, Introduction; Section 2, The Rindler frame force and inertia
Mass is read as captured field energy rather than as innate substance. On this account the mass-like properties of matter reflect the energy and momentum of the quantum vacuum radiation, so that the law of motion — and its relativistic form — traces back not to mass residing in matter, whether innate or supplied by a Higgs mechanism, but to a purely electromagnetic effect, with analogous contributions from the other vacuum fields still to be worked out.Section 1, Introduction; Section 10, Discussion
The extension to weight is a symmetry argument rather than a new postulate. An object held fixed above a gravitating body is, relative to the freely falling local Lorentz frames sweeping past it, undergoing constant proper acceleration; by local Lorentz invariance the vacuum in those falling frames is the same vacuum as in the accelerated case, so the same asymmetry and the same reaction force must appear. Inertial mass and passive gravitational mass are therefore identical, not merely equal, and the weak equivalence principle follows instead of being assumed — Rindler’s ‘very mysterious fact’, quoted in the paper, gets a mechanism.Section 4, The physical basis of the principle of equivalence; Conclusion 1
Newton’s law of gravitation drops out in the weak-field limit with no further input. Once a gravitating body is taken to distort the electromagnetic vacuum at each point exactly as acceleration would, the resulting field is central and radial by spherical symmetry, scales linearly with the source mass, has field lines that begin and end only where mass is present, and adds vectorially — and ordinary potential theory then leaves only the inverse-square form.Section 7, Derivation of Newton’s law of gravitation, equation 26; Conclusion 3
There is a proposed measurement, and it has no free parameters. Take the interior of a conducting cavity as the archetype: its contribution to mass is the summed zero-point energies of its own resonant modes, up to the plasma frequency of the electrons in the walls, divided by the speed of light squared, each mode broadened by a Lorentzian lineshape. Weigh the assembled cavity on a precision balance at the lowest temperature reachable, then take it apart and weigh the components. The assembled cavity should read very slightly heavier, and the excess is that mode energy. The authors state plainly that a positive result would establish the reality of the zero-point field, and just as plainly that the predicted excess is very small even for a large cavity.Section 3, On the electromagnetic model of the accelerated object, equations 15, 20 and 21; Conclusions 6 and 7
What is supplied is the mechanism general relativity leaves out, and what is still owed is named. Geometrodynamics fixes the metric and therefore the geodesics, but only assumes that departing from a geodesic produces an inertia reaction force; here the same vacuum asymmetry gives the inertia reaction force under true acceleration and gives weight when an object is held stationary in a non-Minkowski metric. The authors are explicit that this leaves active gravitational mass — the bending of spacetime by matter in the first place — still unexplained, and that the hypothesis has so far been developed only for the electromagnetic vacuum, with the other interactions to come.Section 5, Consistency with Einstein’s general relativity; Section 8, On the origin of weight; Section 10, Discussion; Conclusion 4
The way in
https://doi.org/10.1002/andp.20055170802How to cite it
Alfonso Rueda, Bernard Haisch (2005) Gravity and the quantum vacuum inertia hypothesis doi:10.1002/andp.20055170802