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arXiv 1202.5936gr-qc
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创造了一个有着厚厚墙壁的宇宙

Creating universes with thick walls

Andrew Ulvestad, Andreas Albrecht

摘要:

研究了由四次势中的标量场产生的球对称假真空泡在被“厚壁”隔开的真真空区中的动力学行为。我们研究了“Farhi-Guth-Guven”(FGG)量子隧穿过程,通过构造与这个过程相关的数值解。ADM质量的时空计算,我们表明,有一个下界,是一个显着的分数的标量场质量。我们认为,零质量的解决方案,用于一些反对物理的FGG过程中使用的薄壁近似在早期的工作中使用的文物。我们认为,零质量的解决方案不应该被用来质疑FGG过程的可行性。

英文摘要:

We study the dynamics of a spherically symmetric false vacuum bubble embedded in a true vacuum region separated by a "thick wall", which is generated by a scalar field in a quartic potential. We study the "Farhi-Guth-Guven" (FGG) quantum tunneling process by constructing numerical solutions relevant to this process. The ADM mass of the spacetime is calculated, and we show that there is a lower bound that is a significant fraction of the scalar field mass. We argue that the zero mass solutions used to by some to argue against the physicality of the FGG process are artifacts of the thin wall approximation used in earlier work. We argue that the zero mass solutions should not be used to question the viability of the FGG process.

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