论文标题
修饰的重力，消失的宇宙常数
Modified gravity with disappearing cosmological constant
论文作者
论文摘要
在修改后的$ f（r）重力的背景下，考虑了对一般相对性的新校正，这些重力满足了宇宙学和局部重力约束。所提出的模型在大曲率下渐近地表现为$ R-2λ$，并显示了宇宙学常数在平坦的时空限制下消失的消失。分析了局部系统的变色龙机理和薄壳限制，并发现了模型的边界。近期偏差参数$ m $的陡度导致物质扰动中标量调整的可测量信号，从而允许检测出发形成$λ$ CDM模型。分析了加权生长速率$fσ_8（z）$的理论结果，从提出的模型中分析。
New corrections to General Relativity are considered in the context of modified $f(R)$ gravity, that satisfy cosmological and local gravity constraints. The proposed models behave asymptotically as $R-2Λ$ at large curvature and show the vanishing of the cosmological constant at the flat spacetime limit. The chameleon mechanism and thin shell restrictions for local systems were analyzed, and bounds on the models were found. The steepness of the deviation parameter $m$ at late times leads to measurable signal of scalar-tensor regime in matter perturbations, that allows to detect departures form the $Λ$CDM model. The theoretical results for the evolution of the weighted growth rate $fσ_8(z)$, from the proposed models, were analyzed.
