漂移波不稳定性中的自发和显式宇称时间对称破缺
Spontaneous and explicit parity-time-symmetry breaking in drift wave instabilities
摘要：
采用宇称时间（PT）对称性分析方法研究了高维、复杂的漂移波不稳定性参数空间。我们发现自发的PT对称破缺导致漂移波的离子温度梯度（ITG）不稳定性，而碰撞不稳定性是PT对称破缺的结果。发现了一种新的由有限碰撞引起的不稳定漂移波。研究还发现，当PT对称性被有限碰撞性破缺时，离子温度和密度的梯度会使离子回旋波不稳定。
英文摘要：
A method of Parity-Time (PT)-symmetry analysis is introduced to study the high dimensional, complicated parameter space of drift wave instabilities. We show that spontaneous PT-symmetry breaking leads to the Ion Temperature Gradient (ITG) instability of drift waves, and the collisional instability is the result of explicit PT-symmetry breaking. A new unstable drift wave induced by finite collisionality is identified. It is also found that gradients of ion temperature and density can destabilize the ion cyclotron waves when PT symmetry is explicitly broken by a finite collisionality.
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