The stellarator as a concept of magnetic confinement fusion requires careful design to confine particles effectively. A design possibility is to equip the magnetic field with a property known as quasisymmetry. Though it is generally believed that a steady-state quasisymmetric equilibrium can only be exact locally (unless the system has a direction of continuous symmetry such as the tokamak), we suggest in this work that a change in the equilibrium paradigm can ameliorate this limitation. We demonstrate that there exists a deep physical connection between quasisymmetry and magnetostatic equilibria with anisotropic pressure, extending beyond the isotropic pressure equilibria commonly considered.

中文翻译：

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聚变等离子体中准对称磁场与各向异性压力平衡之间的联系

作为磁约束聚变概念的仿星器需要仔细设计以有效地约束粒子。一种设计可能性是为磁场配备一种称为准对称性的特性。尽管通常认为稳态准对称平衡只能局部精确（除非系统具有连续对称的方向，例如托卡马克），但我们在这项工作中建议平衡范式的变化可以改善这种限制。我们证明了准对称性和具有各向异性压力的静磁平衡之间存在深刻的物理联系，超出了通常考虑的各向同性压力平衡。