具有小正宇宙学常数的婴儿泡宇宙的催化创生
Catalytic Creation of Baby Bubble Universe with Small Positive Cosmological Constant
摘要：
我们研究了由黑洞和弦云催化的亚稳态de Sitter真空、Minkowski真空和反de Sitter真空的衰变。我们应用该方法在Banerjee，Danielsson，Dibitetto，Giri和Schillo最近提出的五维反de Sitter时空中创建四维泡沫宇宙。我们研究了气泡的产生过程中的反弹作用，发现具有非常小的宇宙学常数的$Λ^{(4)}/M^2_4 \sim 10^{-120}$级气泡，通过假设黑洞和弦云的适当质量尺度，再现气泡宇宙中物质和辐射的当前能量密度，受到催化作用的青睐。
英文摘要：
We investigate the decay of metastable de Sitter, Minkowski and anti-de Sitter vacua catalyzed by a black hole and a cloud of strings. We apply the method to the creation of the four dimensional bubble universe in the five dimensional anti-de Sitter spacetime recently proposed by Banerjee, Danielsson, Dibitetto, Giri and Schillo. We study the bounce action for the creation and find that the bubble with very small cosmological constant, of order $Λ^{(4)}/M^2_4 \sim 10^{-120}$, is favored by the catalysis by assuming appropriate mass scales of the black hole and the cloud of strings to reproduce the present energy densities of matter and radiation in the bubble universe.
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