论文标题
具有振荡状态方程的标量场的宇宙学后果。 ii。振荡缩放和混乱的加速解决方案
Cosmological consequences of a scalar field with oscillating equation of state. II. Oscillating scaling and chaotic accelerating solutions
论文作者
论文摘要
多频道方案可用于解决宇宙学的巧合问题。在本文中，在考虑了早期的辐射时代之后，我们重新审视了[https://doi.org/10.1103/physrevd.101.063531，Phys，Phys。修订版D {\ bf 101}，063531（2020）]。我们发现该模型允许宇宙在辐射时代的振荡缩放解决方案（OSS），而在物质时代的混乱加速解决方案（CAS）。从数学上讲，从OSS到CAS的过渡是一种跨越分叉到混乱的周期途径。从身体上讲，有两个原因说服我们这种情况可以是描述真实宇宙的好情况。一个是，如果宇宙在辐射时代的OSS演变为OSS，那么全球宇宙参数的约束是可行的。另一个是CAS所描述的后期宇宙可以成功解释低红移时观察到的宇宙加速度。
Multiacceleration scenario can be used to solve the cosmological coincidence problem. In this paper, after considering the early radiation era, we revisit the cosmological dynamics of the oscillating dark energy model proposed in [https://doi.org/10.1103/PhysRevD.101.063531, Phys. Rev. D {\bf 101}, 063531 (2020)]. We find this model allows the Universe evolves as oscillating scaling solution (OSS) in the radiation era and as chaotic accelerating solution (CAS) in the matter era. Mathematically, the transition from OSS to CAS is a route of period-doubling bifurcation to chaos. Physically, there are two reasons convince us that this scenario can be a nice picture to describe the real Universe. One is the global cosmological parameter constraints are practicable if the Universe evolves as OSS in the radiation era. The other is the late-time Universe described by CAS can successfully explain the observed cosmic acceleration at low redshifts.
