The Tension of Space as Dark Energy: Dynamics and Phenomenology
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866917370625261568 |
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| author | Khan, Muhammad Ghulam Khuwajah |
| author_facet | Khan, Muhammad Ghulam Khuwajah |
| contents | We propose a phenomenological framework in which the observed late-time dark-energy sector is interpreted as the intrinsic tension of space itself. Motivated by recent observational hints that the dark-energy equation of state may exhibit mild low-redshift evolution, we begin from an intrinsic membrane description of spacetime and show that a uniform space tension contributes to the gravitational field equations with precisely the tensor structure of vacuum energy. We then consider its Dirac--Born--Infeld completion, which naturally introduces a hidden Abelian $U(1)$ gauge sector on the membrane of space. Within this setting, we study a late-time hidden symmetry-breaking transition $U(1)_h \to \mathbb{Z}_n$, which reorganizes hidden magnetic energy into a coarse-grained flux-tube reservoir. If this reservoir exchanges energy with the dynamical part of the space-tension sector, the effective dark-energy density becomes time dependent and acquires a nontrivial equation of state. At the background level, the model yields a simple proof-of-concept realization of mild running dark energy and admits a transient crossing of the phantom divide. We compare the resulting evolution with a compressed observational benchmark in the effective Chevallier--Polarski--Linder plane. Although the minimal single-reservoir realization does not exactly reproduce the benchmark target, it generates a phenomenologically relevant low-redshift evolution and points toward a late hidden-sector transition together with a substantial hidden defect population. The construction should therefore be viewed not as a complete theory of dark energy, but as a physically transparent proof of concept. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2507_20073 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The Tension of Space as Dark Energy: Dynamics and Phenomenology Khan, Muhammad Ghulam Khuwajah General Relativity and Quantum Cosmology High Energy Physics - Phenomenology We propose a phenomenological framework in which the observed late-time dark-energy sector is interpreted as the intrinsic tension of space itself. Motivated by recent observational hints that the dark-energy equation of state may exhibit mild low-redshift evolution, we begin from an intrinsic membrane description of spacetime and show that a uniform space tension contributes to the gravitational field equations with precisely the tensor structure of vacuum energy. We then consider its Dirac--Born--Infeld completion, which naturally introduces a hidden Abelian $U(1)$ gauge sector on the membrane of space. Within this setting, we study a late-time hidden symmetry-breaking transition $U(1)_h \to \mathbb{Z}_n$, which reorganizes hidden magnetic energy into a coarse-grained flux-tube reservoir. If this reservoir exchanges energy with the dynamical part of the space-tension sector, the effective dark-energy density becomes time dependent and acquires a nontrivial equation of state. At the background level, the model yields a simple proof-of-concept realization of mild running dark energy and admits a transient crossing of the phantom divide. We compare the resulting evolution with a compressed observational benchmark in the effective Chevallier--Polarski--Linder plane. Although the minimal single-reservoir realization does not exactly reproduce the benchmark target, it generates a phenomenologically relevant low-redshift evolution and points toward a late hidden-sector transition together with a substantial hidden defect population. The construction should therefore be viewed not as a complete theory of dark energy, but as a physically transparent proof of concept. |
| title | The Tension of Space as Dark Energy: Dynamics and Phenomenology |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2507.20073 |