发表机构
Columbia University; Universidad Adolfo Ibáñez（哥伦比亚大学; 阿道夫·伊巴涅斯大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文在广义相对论标架表述下提出引力重连理论，定量刻画引力场片连通性改变，并揭示其对能量-动量交换及引力螺旋度演化的影响。
AI 中文摘要
在广义相对论的标架表述中，引力场的理想欧姆型条件意味着引力通量的守恒以及引力场片连通性的保持。我们通过发展引力重连理论来研究偏离理想引力演化的后果，引力重连定义为由引力场理想冻结演化的破坏所引起的引力场片连通性的改变。我们推导了引力重连率的定量度量，表明引力重连改变了引力与物质部门之间的能量-动量交换，并确定了它如何修正引力螺旋度的演化。我们的结果为描述动力学时空中引力连通性的变化及其后果提供了一个定量框架。
英文摘要
In a tetrad formulation of general relativity, an ideal Ohm-type condition for the gravitational field implies the conservation of gravitational fluxes and the preservation of the connectivity of gravitational field sheets. We investigate the consequences of departures from ideal gravitational evolution by developing a theory of gravitational reconnection, defined as a change in the connectivity of gravitational field sheets arising from the breakdown of the ideal frozen-in evolution of the gravitational field. We derive quantitative measures of the gravitational reconnection rate, show that gravitational reconnection alters the energy-momentum exchange between the gravitational and matter sectors, and determine how it modifies the evolution of gravitational helicity. Our results provide a quantitative framework for describing changes in gravitational connectivity and their consequences in dynamical spacetimes.
CommentsTo appear in Physical Review D
