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arXiv · 2504.04820

Dark energy under a gauge symmetry: A review of gauged quintessence and its implications

Kunio Kaneta·Hye-Sung Lee·Jiheon Lee·Jaeok Yi
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Abstract

We review the gauged quintessence scenario, wherein the quintessence scalar field responsible for dark energy is promoted to a complex field charged under a dark $U(1)$ gauge symmetry. This construction leads to new and potentially rich cosmological phenomenology. After a concise recap of the standard quintessence scenario, we highlight how a $U(1)$ gauge invariance alters the dynamics of the scalar and the associated dark gauge boson. We survey the evolution of both fields across cosmic history, discuss their possible production via a misalignment mechanism, and examine implications for the Hubble tension. We also comment on potential non-gravitational signals of gauged quintessence through kinetic mixing (the dark photon vector portal).

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Kunio Kaneta, Hye-Sung Lee, Jiheon Lee, Jaeok Yi. 2025-04-07. Dark energy under a gauge symmetry: A review of gauged quintessence and its implications. https://arxiv.org/abs/2504.04820

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