准指数膨胀动力学：标量场势能的启示

IF 1.3 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

International Journal of Theoretical Physics Pub Date : 2024-09-21 DOI:10.1007/s10773-024-05754-0

Sahit Kumar, S. D. Pathak, Maxim Khlopov

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引用次数: 0

摘要

我们目前的观测还没有明确确定时空膨胀因子的确切形式。我们有可能正在经历一个膨胀的过渡阶段，其特征是膨胀和幂律膨胀的结合。我们将空间均匀的超速子标量场、五子场和幽灵场视为动态暗能量的潜在候选者。我们计算了这三类标量场在三种不同的膨胀尺度因子混合形式下与时间相关的势和场：第一种是时间的对数函数；第二种是时间的幂律函数的线性组合；第三种是时间的幂律函数和指数函数的乘积。

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Dynamics of Quasi-Exponential Expansion: Scalar Field Potential Insights

Our current observations have not definitively determined the exact form of the expansion factor of spacetime. It is possible that we are experiencing a transitional stage of expansion, characterized by a combination of inflation and power-law expansion. We consider spatially homogeneous tachyon scalar fields, quintessence, and phantom fields as potential candidates for dynamical dark energy. The time-dependent potentials and fields of these three classes of scalar fields are calculated for three different mixed forms of the scale factor of expansion: firstly, a logarithmic function of time; secondly, a linear combination of power law functions of time; and thirdly, a product of power law and exponential functions of time, respectively.

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来源期刊

International Journal of Theoretical Physics 物理-物理：综合

CiteScore

2.50

自引率

21.40%

发文量

258

审稿时长

3.3 months

期刊介绍： International Journal of Theoretical Physics publishes original research and reviews in theoretical physics and neighboring fields. Dedicated to the unification of the latest physics research, this journal seeks to map the direction of future research by original work in traditional physics like general relativity, quantum theory with relativistic quantum field theory,as used in particle physics, and by fresh inquiry into quantum measurement theory, and other similarly fundamental areas, e.g. quantum geometry and quantum logic, etc.