Enlarging the space of viable inflation models: A slingshot mechanism
Enlarging the space of viable inflation models: A slingshot mechanism
复制标题
扩大可行的通货膨胀模型的空间:弹弓机制
DOI:
10.1103/physrevd.100.083516
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发表时间:
2019
影响因子:
5
通讯作者:
Thomas, Brooks
中科院分区:
文献类型:
--
作者:
Dienes, Keith R.;Kost, Jeff;Thomas, Brooks
The viability of a given model for inflation is determined not only by the form of the inflaton potential, but also by the initial inflaton field configuration. In many models, field configurations which are otherwise well-motivated nevertheless fail to induce inflation, or fail to produce an inflationary epoch of duration sufficient to solve the horizon and flatness problems. In this paper, we propose a mechanism which enables inflation to occur even with such initial conditions. Our mechanism involves multiple scalar fields which experience a time-dependent mixing. This in turn leads to a “re-overdamping” phase as well as a parametric resonance which together “slingshot” the inflaton field from regions of parameter space that do not induce inflation to regions that do. Our mechanism is flexible, dynamical, and capable of yielding an inflationary epoch of sufficiently long duration. This slingshot mechanism can therefore be utilized in a variety of settings and thereby enlarge the space of potentially viable inflation models.
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影响因子:
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发表时间:
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