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arXiv 2210.06142gr-qc
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宇宙学反弹期间虫洞的产生

Creation of wormholes during the cosmological bounce

Petar Pavlović, Marko Sossich

AI总结:

本文证明在宇宙学反弹期间无需奇异物质即可自然产生满足弱能量条件的虫洞,它们会在特定时期大量存在并改变时空因果结构,随后消失。

摘要:

在这项工作中,我们证明了虫洞原则上可以在宇宙学反弹期间自然产生,而无需奇异物质或对引力部分进行任何额外修改,除了实现宇宙学反弹所需的那一项修改。这一结果是普遍的,并不依赖于支持反弹所需的引力方程修改的具体细节。为了研究宇宙学反弹周围虫洞可能的存在性,我们引入了支持反弹解所需的爱因斯坦场方程的一般修改。在这一框架下,我们表明可以构造一个由物质、辐射和真空能支持的宇宙学虫洞解,满足弱能量条件(WEC),并且渐近趋近于Friedmann-Lemaître-Robertson-Walker(FLRW)度规。然而,在某个特定的宇宙学时刻——该时刻取决于反弹宇宙学模型的参数——描述支持此类虫洞所需物质的WEC会自发地被违反。这意味着这类虫洞在反弹前后的某个时期内可能大量存在,显著改变时空的因果结构,随后消失。

英文摘要:

In this work we demonstrate that wormholes can in principle be naturally created during the cosmological bounce without the need for the exotic matter or any kind of additional modifications of the gravitational sector, apart from the one enabling the cosmological bounce. This result is general and does not depend on the details of the modifications of gravitational equations needed to support the bounce. To study the possible existence of wormholes around the cosmological bounce we introduce general modifications of Einstein's field equations need to support the bouncing solutions. In this regime we show that it is possible to construct a cosmological wormhole solution supported by matter, radiation and vacuum energy, satisfying the Weak Energy Condition (WEC), which asymptotically approaches the Friedmann-Lemaître-Robertson-Walker (FLRW) metric. However, at a specific cosmological time, which depends on the parameters of the bouncing cosmological model, the WEC describing the matter needed to support such wormholes is spontaneously violated. This means that such wormholes could potentially exist in large numbers during some period around the bounce, significantly changing the causal structure of space-time, and then vanish afterwards.

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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