Motivated by results implying that the constituents of dark matter (DM) might be collisional, we consider a cosmological (toy-) model, in which the DM itself possesses some sort of thermodynamic properties. In this case, not only can the matter content of the Universe be treated as a classical gravitating fluid of positive pressure, but, together with all its other physical characteristics, the energy of this fluid's internal motions should be taken into account as a source of the universal gravitational field. This form of energy can compensate for the extra (dark) energy, needed to compromise spatial flatness, while the post-recombination Universe remains ever-decelerating. At the same time (i.e., in the context of the collisional-DM approach), the theoretical curve representing the distance modulus as a function of the cosmological redshift, μ(z), fits the Hubble diagram of a multi-used sample of supernova Ia events quite accurately. A cosmological model filled with collisional DM could accommodate the majority of the currently-available observational data (including, also, those from baryon acoustic oscillations), without the need for either any dark energy (DE) or the cosmological constant. However, as we demonstrate, this is not the case for someone who, although living in a Universe filled with self-interacting DM, insists on adopting the traditional, collisionless-DM approach. From the point of view of this observer, the cosmologically-distant light-emitting sources seem to lie farther (i.e., they appear to be dimmer) than expected, while the Universe appears to be either accelerating or decelerating, depending on the value of the cosmological redshift. This picture, which, nowadays, represents the common perception in observational cosmology, acquires a more conventional interpretation within the context of the collisional-DM approach.
由于从理论和实验两个方面都存在的一些缺陷，广义相对论不可能成为引力的权威理论。在大尺度上（天体物理学和宇宙学），试图将它与最新的观测数据相匹配，导致调用暗能量和暗物质作为宇宙流体的主体成分。由于在基本水平上，没有最终的证据存在于这些成分中，很明显，广义相对论在红外尺度上存在缺陷。另一方面，试图制定比爱因斯坦的理论更一般的理论会引起数学上的困难，需要解决办法，这反过来又会从解释的角度产生问题。我们在这里提出了一个全新的方法来数学对象的引力理论可以写在一阶（a' la Palatini）形式主义，并介绍了暗度规的概念，它可以完全绕过引入干扰概念，如暗能量和暗物质。
最近的观测证据表明宇宙细丝在百万秒差距尺度上旋转（Wang et al，Nature Astronomy 5，839-845（2021）），需要在暗物质的物理学中进行解释。传统的无碰撞冷粒子暗物质通过潮汐扭矩被限制为产生宇宙细丝自旋，但这种解释需要从准线性区域外推到非线性区域。同时，在超轻的背景下不存在替代解释（例如，轴子）暗物质，事实上这些模型会天真地预测宇宙细丝的零自旋。在这封信中，我们在超轻暗物质（例如超轻轴子）以及玻色子和费米子凝聚（例如超流体和超导体）的理论中研究宇宙丝旋转。这些模型区别于传统的粒子暗物质模型的可能性暗物质漩涡。我们采取一个模型不可知的方法，并证明了一个黑暗的漩涡的集合可以解释在王等人报道的数据。建模一个简单的双参数分析模型，对应于平均的速度场的漩涡的集合，我们发现一个很好的适合的数据。我们进行了马尔可夫链蒙特卡罗分析，并找到限制的漩涡，暗物质质量的数量，和半径的内部核心区域的漩涡分布，为了超轻暗物质来解释旋转的宇宙细丝。
Dark Energy: Casimir Effect, Generalized Homogeneity and Axions
这篇论文已经撤回，因为一个更好的版本，G。Gazzola，M. C.尼弥斯和W. F. Wreszinski - On the Casimir Energy for a massive quantum标量场and the宇宙学常数- Annals of Physics（纽约）第324卷，第2095-2107（2009）号，它纠正了本报告中的几个概念错误。
