手征场穿过的虫洞
Wormholes Threaded by Chiral Fields
摘要：
我们考虑具有幻场和手征物质场的洛伦兹虫洞。手征场由非线性西格玛模型描述，有或没有Skyrme项。当手征场的引力耦合增加时，虫孔的几何形状发生变化。单喉被双喉取代，中间有一个肚子。对于耦合的最大值，两个喉部的半径达到零。然后，内部部分被夹断，留下一个封闭的宇宙和两个（渐近）平坦的空间。稳定性分析表明，所有穿过手征场的虫洞继承了Ellis虫洞的不稳定性。
英文摘要：
We consider Lorentzian wormholes with a phantom field and chiral matter fields. The chiral fields are described by the non-linear sigma model with or without a Skyrme term. When the gravitational coupling of the chiral fields is increased, the wormhole geometry changes. The single throat is replaced by a double throat with a belly inbetween. For a maximal value of the coupling, the radii of both throats reach zero. Then the interior part pinches off, leaving a closed universe and two (asymptotically) flat spaces. A stability analysis shows that all wormholes threaded by chiral fields inherit the instability of the Ellis wormhole.
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。
