标题： 宇宙反弹和通过隧穿的类幻影状态方程 显示英文标题

标题： Cosmic bounce and phantom-like equation of state from tunnelling

摘要： 我们允许在平坦FLRW背景度规上的标量场在两个简并真空中隧穿。 由此产生的真真空态随后会违反零能量条件，相应的均匀流体引发反弹，在此之后它具有类似幻影的方程状态，并渐近地导致德西特相。 这里提出的机制不需要奇异物质或修改引力，它完全由量子涨落产生，并适用于一般的双阱势。 显示英文摘要

摘要： We allow a scalar field on a flat FLRW background metric to tunnel between two degenerate vacua. The resulting true vacuum state then violates the Null Energy Condition, and the corresponding homogeneous fluid induces a bounce, after which it has a phantom-like equation of state and asymptotically leads to a de Sitter phase. The mechanism presented here requires no exotic matter or modified gravity, it is purely generated by quantum fluctuations and is valid for a generic double well potential.