无障碍重力隧道
Tunneling without barriers with gravity
摘要:
我们考虑平坦Minkowski空间到反de Sitter空间的真空衰变。我们发现一个单参数家庭的潜力,允许精确的,分析瞬子的解决方案描述隧道在重力的存在下,没有障碍。在没有引力的情况下,李和温伯格在25年前就发现并讨论了这种瞬子。反弹动作也是解析计算的。我们讨论这些新的瞬子宇宙学的背景下,弦论景观的可能影响。
英文摘要:
We consider the vacuum decay of the flat Minkowski space to an anti-de Sitter space. We find a one-parameter family of potentials that allow exact, analytical instanton solutions describing tunneling without barriers in the presence of gravity. In the absence of gravity such instantons were found and discussed by Lee and Weinberg more than a quarter of a century ago. The bounce action is also analytically computed. We discuss possible implications of these new instantons to cosmology in the context of the string theory landscape.
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