标题： Dirac材料真空的非线性电动力学。 光子磁性性质和辐射压力 显示英文标题

标题： Nonlinear electrodynamics for the vacuum of Dirac materials. Photon magnetic properties and radiation pressures

摘要： 我们研究了光子在磁场中穿过狄拉克材料时的磁性性质，考虑了真空和介质贡献。通过在有限密度和温度下非线性欧拉-海森堡电动力学的二阶展开，并结合狄拉克材料参数（狄拉克精细结构常数、带隙和费米速度），得到了光子传播性质。总磁化强度（包括电子和光子贡献）以及光子有效磁矩被计算出来。通过能量-动量张量分量的平均值，得到了诸如光子能量密度、辐射压力和坡印亭矢量等可观测量。所有量均以拉格朗日导数的形式表示。与真空相关的量适用于任意大小的外加磁场，并且弱场和强场极限都被恢复。我们讨论了一些可能有助于测试狄拉克材料中量子电动力学真空中强磁场现象的实验想法，并探讨了磁化强度、辐射压力和双折射的非线性修正如何放大至$10^3$倍QED修正。 显示英文摘要

摘要： We investigate the magnetic properties of photons propagating through Dirac materials in a magnetic field, considering both vacuum and medium contributions. Photon propagation properties are obtained through a second-order expansion of non-linear Euler-Heisenberg electrodynamics at finite density and temperature considering Dirac material parameters (Dirac fine structure constant, band gap and Fermi velocity). Total magnetization (including electrons and photon contributions) and photon-effective magnetic moment are computed. Observables such as photon energy density, radiation pressure, and Poynting vector are obtained by an average of components of the energy-momentum tensor. All quantities are expressed in terms of Lagrangian derivatives. Those related to the vacuum are valid for any value of the external magnetic field, and both the weak and strong field limits are recovered. We discuss some ideas of experiments that may contribute to testing in Dirac materials the phenomenology of the strong magnetic field in the quantum electrodynamic vacuum and how non-linear corrections on the magnetization, radiation pressure, and birefringence, are amplified up to $10^3$ times QED corrections.