| 避免小撕裂的一种机制 |
| |
| 引用本文： | 翟向华,奚萍.避免小撕裂的一种机制[J].上海师范大学学报(自然科学版),2014,43(4):343-348. |
| |
| 作者姓名： | 翟向华 奚萍 |
| |
| 作者单位： | 上海师范大学天体物理中心; |
| |
| 摘 要： | Phantom宇宙的晚期演化可能会导致包括大小撕裂在内的各种未来奇性.例如,在广义相对论中,小撕裂产生于具有平方势的phantom场的演化.本文作者在1/R引力框架下,提出了一种新的机制以避免小撕裂命运.在带有R2修正的1/R引力中,通过数值计算研究了具有各种势的phantom场,包括平方势、立方势和四次方势,在这些势下,奇性都可避免.
|
| 关 键 词： | phantom场 修正引力 宇宙演化 |
| 收稿时间： | 2014/6/20 0:00:00 |
Mechanism of avoiding little rip |
| |
| ZHAI Xianghua and XI Ping.Mechanism of avoiding little rip[J].Journal of Shanghai Normal University(Natural Sciences),2014,43(4):343-348. |
| |
| Authors: | ZHAI Xianghua and XI Ping |
| |
| Institution: | ZHAI Xianghua;XI Ping;Shanghai United Center for Astrophysics(SUCA),Shanghai Normal University; |
| |
| Abstract: | The scalar phantom field ~b leads to various catastrophic fates of the universe including big rip,little rip and other future singularity depending on the choice of its potential. For example,little rip stems from a quadratic potential in general relativity. We suggest a new mechanism to avoid little rip in the 1/R gravity. The phantom field with different potentials, including quadratic ,cubic and quantic potentials are studied via numerical calculation in the 1/R gravity with R2 correction. The singularity is avoidable under all these potentials. |
| |
| Keywords: | phantom field mondified gravity evolution of the universe |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《上海师范大学学报(自然科学版)》浏览原始摘要信息 |
| 点击此处可从《上海师范大学学报(自然科学版)》下载免费的PDF全文 |
