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    Stringent requirements for detecting light-induced gravitational effects using interferometry

    François Fillion-Gourdeau and Steve MacLean

    • Infinite Potential Laboratories, Waterloo, Ontario, Canada, N2L 0A9 and Advanced Laser Light Source (ALLS) at INRS-EMT, 1650 blvd. Lionel-Boulet, Varennes, Quebec, J3X 1P7, Canada

    Phys. Rev. D 111, 122004 – Published 26 June, 2025

    DOI: https://doi.org/10.1103/mhmc-s7mf

    Abstract

    Intense laser fields have been proposed as a means to generate light-induced gravitational effects, providing a novel approach to investigate gravity and its coupling to electromagnetism in a controlled laboratory setting. In this article, a detection scheme based on interferometry is introduced to assess the feasibility of observing such effects. Initially, the space-time deformation and the resulting induced phase difference are evaluated in homogeneous electric fields. Using the theoretical minimum phase sensitivity bound—a known result in quantum information—and accounting for background signal coming from photon-photon scattering—a fundamental quantum electrodynamics effect related to vacuum properties—a set of stringent requirements for detectability is obtained. Then, a more realistic scenario is considered where gravitational effects are generated by an e-dipole pulse. In all cases considered, it is demonstrated that observing these effects presents significant challenges, even with the capabilities of current and foreseen laser infrastructures.

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