论文标题
在宇宙弹跳期间创建虫洞
Creation of wormholes during the cosmological bounce
论文作者
论文摘要
在这项工作中,我们证明了虫洞原则上可以在宇宙弹跳期间自然产生,而无需进行异国情调或引力部门的任何其他修饰,除了能够启用宇宙反弹的物质。该结果是一般的,不取决于支持反弹所需的重力方程的修改细节。为了研究宇宙反弹周围虫洞的可能存在,我们引入了爱因斯坦田间方程的一般修改,以支持弹跳溶液。在这个方案中,我们表明,可以构建一个由物质,辐射和真空能量支持的宇宙学虫洞溶液,满足弱能量条件(WEC),该解决方案渐近地接近Friedmann-Lema-Lema- Roberton-Robertson-Walker(FLRW)测量。但是,在特定的宇宙学时代,取决于弹跳宇宙学模型的参数,描述了支持这种虫洞所需的问题的WEC被自发侵犯。这意味着,这种虫洞可能在反弹周围的某个时期可能大量存在,从而显着改变时空的因果结构,然后随后消失。
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.