Evolution of the magnetic field in spatially inhomogeneous axion structures

IF 1 4区 物理与天体物理 Q3 PHYSICS, MATHEMATICAL
M. S. Dvornikov, P. M. Akhmet’ev
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引用次数: 0

Abstract

We study the time evolution of magnetic fields in various configurations of spatially inhomogeneous pseudoscalar fields that are a coherent superposition of axions. For such systems, we derive a new induction equation for the magnetic field, which takes this inhomogeneity into account. Based on this equation, we study the evolution of a pair of Chern–Simons waves interacting with a linearly decreasing pseudoscalar field. The nonzero gradient of the pseudoscalar field leads to the mixing of these waves. We then consider the problem in a compact domain in the case where the initial Chern–Simons wave is mirror symmetric. The pseudoscalar field inhomogeneity then leads to an effective change in the \(\alpha\) dynamo parameter. Thus, the influence of a spatially inhomogeneous pseudoscalar field on the magnetic field evolution bears a strong dependence on the system geometry.

空间不均匀轴心结构中的磁场演变
摘要 我们研究了轴子相干叠加的空间不均匀伪标量场的各种配置中磁场的时间演化。对于这类系统,我们推导出一个新的磁场感应方程,其中考虑到了这种不均匀性。基于这个方程,我们研究了一对与线性递减伪标量场相互作用的切尔-西蒙斯波的演化。伪斯卡尔场的非零梯度导致了这些波的混合。然后,我们在一个紧凑域中考虑初始切尔-西蒙斯波是镜像对称的情况。伪斯卡拉场的不均匀性会导致动力学参数的有效变化。因此,空间不均匀伪斯卡尔场对磁场演化的影响与系统几何有很大关系。
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来源期刊
Theoretical and Mathematical Physics
Theoretical and Mathematical Physics 物理-物理:数学物理
CiteScore
1.60
自引率
20.00%
发文量
103
审稿时长
4-8 weeks
期刊介绍: Theoretical and Mathematical Physics covers quantum field theory and theory of elementary particles, fundamental problems of nuclear physics, many-body problems and statistical physics, nonrelativistic quantum mechanics, and basic problems of gravitation theory. Articles report on current developments in theoretical physics as well as related mathematical problems. Theoretical and Mathematical Physics is published in collaboration with the Steklov Mathematical Institute of the Russian Academy of Sciences.
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