论文标题
强度磁场中的中等极化张量（i）：有限温度和密度下的磁性爆发。
In-medium polarization tensor in strong magnetic fields (I): Magneto-birefringence at finite temperature and density
论文作者
论文摘要
我们研究了在最低的Landau水平近似中，在有限的温度和密度下，费米和抗体对的中等偏振效应。通过分析和数值方法检查极化张量的积分表示，我们提供了在真空和中等贡献之间微妙相互作用后获得的极化张量的真实和虚构部分，这本质上是由于Pairi-blocking效应。尤其是，我们在零温度和有限密度下提供了极化张量的完整分析形式，该形式表现出对单个光子衰减到费米和抗体对的奇异阈值行为的精确取消和相关的迁移。作为中等极化张量的物理应用，我们讨论了由强磁场引起的光子的磁性伴随性依赖于极化的分散关系。
We investigate in-medium polarization effects of the fermion and antifermion pairs at finite temperature and density in strong magnetic fields within the lowest Landau level approximation. Inspecting the integral representation of the polarization tensor by analytic and numerical methods, we provide both the real and imaginary parts of the polarization tensor obtained after delicate interplay between the vacuum and medium contributions essentially due to the Pauli-blocking effect. Especially, we provide a complete analytic form of the polarization tensor at zero temperature and finite density that exhibits an exact cancellation and associated relocation of the singular threshold behaviors for a single photon decay to a fermion and antifermion pair. As a physical application of the in-medium polarization tensor, we discuss the magneto-birefringence that is polarization-dependent dispersion relations of photons induced by the strong magnetic fields.
