论文标题
由于散装桥梁相互作用而导致的通货膨胀期间真空能量的缩放
Deflation of Vacuum Energy During Inflation Due to Bulk-Brane Interaction
论文作者
论文摘要
我们考虑了一个蓬松的世界通货膨胀模型，其中通货膨胀是由生活在五维体积中的自我相互作用标量场的动力学驱动的。标量场是非最低限量耦合到木板上物质场的，并充当了诱导缓慢膨胀的充气。我们表明，尽管由于额外的尺寸的影响，弗里德曼方程在早期被修改，但慢速条件与四维情况相同。由于物质与散装标量的非最小耦合，因此两个组件之间存在一个能量转移。我们研究了该能量转移的方向可以从物质到大量标量的条件。在这种情况下，至少有两个优点：1）它建立了一种机制，通过该机制在通货膨胀期间通过该机制在勃褐色上被放气。 2）到达慢速滚动区域中标量场的变化更强烈地阻尼，以给定的电位。然后，我们证明我们的结果得到了具有二次和指数势的数值估计的支持。
We consider a brane world inflationary model in which inflation is driven by dynamics of a self-interacting scalar field living in the five-dimensional bulk. The scalar field is non-minimally coupled to matter fields on the brane and acts as an inflaton which induces a slow-roll inflation. We show that although the Friedmann equation is modified at early times due to effects of the extra dimension, the slow-roll condition is the same as that of the four-dimensional case. Due to the non-minimal coupling of matter with the bulk scalar, there is an energy transfer between the two components. We investigate the conditions under which the direction of this energy transfer can be from matter onto the bulk scalar. There are at least two advantages in this case: 1) It establishes a mechanism by which a large effective cosmological term on the brane is deflated during the inflation period. 2) The energy flow onto the bulk inflaton gives a more strongly damped evolution of the scalar field in the slow-roll region for a given potential. We then show that our results are supported by numerical estimations with quadratic and exponential potentials.
