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arXiv 2402.09863hep-thastro-ph.COgr-qchep-ph
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有限体积下的双瞬子

Double-well instantons in finite volume

Wen-Yuan Ai, Jean Alexandre, Matthias Carosi, Bjorn Garbrecht, Silvia Pla

AI总结:

本研究在有限体积环面空间假设下,解析推导标量场隧穿的单圈真空能,发现Casimir效应与隧穿共同导致零能量条件破缺,且该机制无需修改引力或奇异物质即可引发宇宙反弹。

摘要:

假设空间为有限体积的环面,我们考虑离散动量,解析推导了标量场在两个简并真空之间隧穿的完整单圈真空能。利用Abel-Plana公式计算了任意维度下的Casimir能量,同时借助涨落算符的Green函数计算了单圈瞬子泛函行列式。所得能量特性十分独特:Casimir效应和隧穿均会导致零能量条件(NEC)破缺,这源于非广延的真实真空能。我们讨论了该机制引发宇宙反弹的相关性,该过程无需修改引力或引入奇异物质。

英文摘要:

Assuming a toroidal space with finite volume, we derive analytically the full one-loop vacuum energy for a scalar field tunnelling between two degenerate vacua, taking into account discrete momentum. The Casimir energy is computed for an arbitrary number of dimensions using the Abel-Plana formula, while the one-loop instanton functional determinant is evaluated using the Green's functions for the fluctuation operators. The resulting energetic properties are non-trivial: both the Casimir effect and tunnelling contribute to the Null Energy Condition violation, arising from a non-extensive true vacuum energy. We discuss the relevance of this mechanism to induce a cosmic bounce, requiring no modified gravity or exotic matter.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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