Numerical study of a many-particle adiabatic invariant
Numerical study of a many-particle adiabatic invariant
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DOI：
10.1063/1.866104
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发表时间：
1987-09
影响因子：
4.6
通讯作者：
P. Hjorth;T. M. O'Neil
中科院分区：
文献类型：
--
作者：
P. Hjorth;T. M. O'Neil
对于足够强的磁场中的纯电子等离子体，预计一个不寻常的多电子绝热不变量会限制碰撞动力学。在保持这种不变量的情况下，平行和垂直自由度之间不可能交换能量；系统可以获取并维持两个不同的温度T∥和T⊥。然而，由于绝热不变量不是运动的精确常数，最终会发生平衡，但时间尺度呈指数级增长。这封信介绍了分子动力学模拟的结果，验证了这种不寻常的不变量的存在并验证了理论上预测的平衡率。
For a pure electron plasma in a sufficiently strong magnetic field, an unusual many‐electron adiabatic invariant is predicted to constrain the collisional dynamics. To the extent that this invariant is preserved, no exchange of energy is possible between the parallel and perpendicular degrees of freedom; the system can acquire and maintain two different temperatures, T∥ and T⊥. However, since an adiabatic invariant is not an exact constant of the motion, equilibration eventually takes place, but on an exponentially long time scale. This Letter presents the results of a molecular dynamics simulation, which verifies the existence of this unusual invariant and verifies the theoretically predicted equilibration rate.