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Exact cosmological solutions in vacuum non-coincidence f(Q)-theory 真空非符合f(Q)理论中的精确宇宙学解
IF 2.8 3区 物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS Pub Date : 2026-01-01 DOI: 10.1016/j.nuclphysb.2025.117262
Avik De , Andronikos Paliathanasis
We study exact cosmological solutions in f(Q) gravity formulated beyond the coincident gauge, focusing on the non-coincident connection branch ΓB. Using a minisuperspace approach, the field equations are recast into an equivalent scalar-tensor form, enabling analytic reconstruction of cosmological models. We obtain exact solutions of particular interest, including de Sitter, scaling, ΛCDM, Chaplygin gas, generalized Chaplygin gas, and CPL parameterizations. The corresponding scalar potentials and f(Q) functions are derived in closed or parametric form. Our analysis shows that non-coincident f(Q) gravity admits a richer solution space than the coincident case and can describe both early-time inflationary dynamics and late-time acceleration within a unified framework. These results open new directions for testing f(Q) cosmology against observations and exploring its role as a viable alternative to ΛCDM.
我们研究了f(Q)引力的精确宇宙学解,并将重点放在非符合连接分支ΓB上。利用微型超空间方法,将场方程转换为等价的标量张量形式,实现了宇宙学模型的解析重建。我们获得了特别感兴趣的精确解,包括de Sitter、缩放、ΛCDM、Chaplygin气体、广义Chaplygin气体和CPL参数化。相应的标量势和f(Q)函数以闭合或参数形式导出。我们的分析表明,非一致的f(Q)引力比一致的情况具有更丰富的解空间,并且可以在统一的框架内描述早期暴胀动力学和后期加速。这些结果为根据观测结果检验f(Q)宇宙学以及探索其作为ΛCDM可行替代方案的作用开辟了新的方向。
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引用次数: 0
IF 2.8 3区 物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS Pub Date : 2026-01-01
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引用次数: 0
IF 2.8 3区 物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS Pub Date : 2026-01-01
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引用次数: 0
IF 2.8 3区 物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS Pub Date : 2026-01-01
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引用次数: 0
IF 2.8 3区 物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS Pub Date : 2026-01-01
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引用次数: 0
IF 2.8 3区 物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS Pub Date : 2026-01-01
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引用次数: 0
IF 2.8 3区 物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS Pub Date : 2026-01-01
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引用次数: 0
IF 2.8 3区 物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS Pub Date : 2026-01-01
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引用次数: 0
IF 2.8 3区 物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS Pub Date : 2026-01-01
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引用次数: 0
IF 2.8 3区 物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS Pub Date : 2026-01-01
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引用次数: 0
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Nuclear Physics B
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