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A Note on the Stability of the Dark Energy Model from Time Crystals

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arxiv 2504.16764 v2 pith:G6IWFYSI submitted 2025-04-23 gr-qc hep-phhep-th

Laura Mersini-Houghton This is my paper · ORCID
classification gr-qchep-phhep-th
keywords timecrystalsstabilitydarkenergyfieldmodelnote
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In this note, we investigate the stability of the dark energy model from time crystals proposed in [1]. We emphasize two ingredients, the coupling of the scalar field to gravity, and the fact that these time crystals are on an expanding FRW background, which play a crucial role in the field's dynamics. The Hubble parameter, which contributes a drag term to the equations of motion, grows with time until the scale factor diverges. When taken into account, these factors also alleviate the stability concern of [2].

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  1. Dark Energy from Time Crystals

    hep-ph 2025-02 conditional novelty 5.0 of 10

    A time-crystal scalar field is shown to satisfy the phantom dark energy conditions w < -1, c_s^2 > 0, and rho >= 0 inside the crystal region.

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