论文标题
$ f（q，t）$重力的拉格朗日堕落的效果
Effects of the matter Lagrangian degeneracy in $f(Q,T)$ gravity
论文作者
论文摘要
在本文中，我们调查了该物质拉格朗日堕落的理论和宇宙学效应，以扩展对称触发平行的一般相对性，称为$ f（q，t）$ gravity。这种退化源于以下事实：$ \ MATHCAL {l} _M = P $和$ \ MATHCAL {l} _M = -p $都可以引起完美流体的压力 - 能量张量。 $ f（q，t）$方程取决于拉格朗日的物质的形式，因此，它们的变性也对灰尘物质和辐射的密度演变影响，在进行Monte Carlo Markov链分析时的宇宙学参数置信区域的变化。我们的结果表明，自从Lagrangian改变问题以来会导致不同的理论和宇宙学结果，因此未来在$ F（Q，T）$ GRAVITY中的研究应考虑两种形式的Lagrangians，以说明不同的数学和观察结果。
In this paper, we investigated the theoretical and cosmological effects of the matter Lagrangian degeneracy in an extension of the Symmetric Teleparallel Equivalent of General Relativity, denoted as $f (Q, T )$ gravity. This degeneracy comes from the fact that both $\mathcal{L}_m = p$ and $\mathcal{L}_m = -ρ$ can give rise to the stress-energy tensor of a perfect fluid. The $f(Q,T)$ equations depend on the form of the matter Lagrangian and hence they also have a degeneracy that has influence on the density evolution of dust matter and radiation, on the form of the generalized Friedmann equations and also shows changes in the cosmological parameters confidence regions when performing Monte Carlo Markov Chains analyses. Our results suggest that since changing the matter Lagrangian causes different theoretical and cosmological results, future studies in $f(Q,T)$ gravity should consider both forms of the matter Lagrangians to account for the different mathematical and observational results.
