Abstract
The pilot-wave theory is an alternative, but less used, interpretation of Quantum Mechanics. In that framework, elementary particles are guided by a wave and move along well defined trajectories. A fascinating idea is the possibility to describe the de Broglie wave as oscillations of the gravitational field, thereby giving geometrical meaning to the pilot-wave of a quantum corpuscle. In this work we will investigate the polarizations of the de Broglie gravitational wave and we will find that the spin-2 metric perturbation breaks down into two tensor (helicity-2), two vector (helicity-1) and two scalar (helicity-0) components. We will show that these dynamical variables satisfy the equation of the harmonic oscillator, meaning that they represent the physical degrees of freedom of the wave. We will also propose a method to measure the scalar modes, containing longitudinal components that are absent in standard transverse gravitational waves.
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Notes
For a review of the recent results see [14].
The theory is linear in \(h_{ab}\), meaning that we neglect terms of order \(\vert h_{ab}\vert ^2\) and higher.
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D’Errico, L., Benedetto, E. & Feoli, A. On the polarization states of the de Broglie gravitational wave. Gen Relativ Gravit 55, 83 (2023). https://doi.org/10.1007/s10714-023-03132-5
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DOI: https://doi.org/10.1007/s10714-023-03132-5