标题： Λ=0 无限薄膜宇宙的宇宙学 显示英文标题

标题： Λ=0 Cosmology of a Brane-like Universe

摘要： 我们研究了 Friedmann-Robertson-Walker 宇宙学演化可能由有效的（而非实际的）能量密度所支配的可能性。 一个具体的例子是由$\Lambda=0$Regge-Teitelboim 宇宙学提供的，在其中临界宇宙只需要次临界物质密度$(\Omega_{m}<1)$，并且平坦的物质主导宇宙的年龄会增强 9/8 倍。 成熟稀疏宇宙的对偶是胚胎宇宙，两者的演化都由$P_{eff}=-{1/9}\rho_{eff}$所支配。 显示英文摘要

摘要： We examine the possibility that Friedman-Robertson-Walker evolution is governed by an effective (rather then by the actual) energy density. A concrete example is provided by $\Lambda=0$ Regge-Teitelboim cosmology, where critical cosmology only requires subcritical matter density $(\Omega_{m}<1)$, and the age of a flat matter dominated Universe gets enhanced by a factor of 9/8. Dual to the mature dilute Universe is the embryo Universe, the evolution of both is governed by $P_{eff}=-{1/9}\rho_{eff}$.