标题： 动态虫洞与粒子产生机制 显示英文标题

标题： Dynamic wormholes with particle creation mechanism

摘要： 本文研究一种球对称的时空，该时空在空间无限远处渐近于弗里德曼-勒梅特-罗伯逊-沃尔克（FRW）时空，并表示虫洞配置：物质成分分为两部分——(a) 耗散但均匀各向同性的流体，以及 (b) 非均匀各向异性的等熵流体。 当各向同性流体具有幻影性质时，可以得到演化的虫洞解，并且在末期存在大撕裂奇点。 在这里，耗散现象是由于非平衡热力学中的粒子产生机制。 使用被认为是绝热的过程，耗散压力线性地表示为粒子产生率。 对于粒子产生率作为哈勃参数函数的两种选择，各向同性流体的状态方程参数被限制在幻影区域，除了其中一种选择外，有可能获得具有正常各向同性流体的虫洞配置。 显示英文摘要

摘要： The present work deals with a spherically symmetric space-time which is asymptotically (at spatial infinity) FRW space-time and represents wormhole configuration: The matter component is divided into two parts--(a) dissipative but homogeneous and isotropic fluid, and (b) an inhomogeneous and anisotropic barotropic fluid. Evolving wormhole solutions are obtained when isotropic fluid is phantom in nature and there is a big rip singularity at the end. Here the dissipative phenomena is due to the particle creation mechanism in non-equilibrium thermodynamics. Using the process to be adiabatic, the dissipative pressure is expressed linearly to the particle creation rate. For two choices of the particle creation rate as a function of the Hubble parameter, the equation of state parameter of the isotropic fluid is constrained to be in the phantom domain, except in one choice, it is possible to have wormhole configuration with normal isotropic fluid.