论文标题
将PoincaréGauge宇宙学映射到Horndeski理论的新兴黑暗能源
Mapping Poincaré gauge cosmology to Horndeski theory for emergent dark energy
论文作者
论文摘要
十参数，二次庞加莱量规理论是一般相对论的合理替代方案。我们表明，仪表理论的丰富背景宇宙学是由约旦框架中的非典型的双尺度调度理论描述的：“度量类似物”。这为更广泛的社区提供了一个统一的框架，以便将来调查。对于许多参数选择，非传统术语将$ \ smash {\ sqrt {| x^{ϕ ϕ ϕ} |}} $降低至表单的cuscuton字段。 Einstein-Cartan-Kibble-Sciasa理论将纯正的二次Cuscuton映射，而触发理论将其映射到Einstein-Hilbert Lagrangian。我们将度量类似物应用于庞加莱仪理论的新型统一和功率 - 可统一的十分典范案例。这些理论支持一致性$λ$ CDM背景宇宙学，直到有效的，有效的深色辐射组件，我们用停滞的库斯卡顿解释了这种行为。我们还从其中一种情况获得了两种暗能解决方案：从筛分尺寸的负裸露宇宙常数加速膨胀，并在$λ$ cdm中替代消失的裸宇宙常数。
The ten-parameter, quadratic Poincaré gauge theory of gravity is a plausible alternative to general relativity. We show that the rich background cosmology of the gauge theory is described by a non-canonical bi-scalar-tensor theory in the Jordan frame: the `metrical analogue'. This provides a unified framework for future investigation by the broader community. For many parameter choices, the non-canonical term reduces to a Cuscuton field of the form $\smash{\sqrt{|X^{ϕϕ}|}}$. The Einstein-Cartan-Kibble-Sciama theory maps to a pure quadratic Cuscuton, whereas the teleparallel theory maps to the Einstein-Hilbert Lagrangian. We apply the metrical analogue to novel unitary and power-counting-renormalisable cases of Poincaré gauge theory. These theories support the concordance $Λ$CDM background cosmology up to an optional, effective dark radiation component, we explain this behaviour in terms of a stalled Cuscuton. We also obtain two dark energy solutions from one of these cases: accelerated expansion from a negative bare cosmological constant whose magnitude is screened, and emergent dark energy to replace vanishing bare cosmological constant in $Λ$CDM.
