有限温度下诱导Schwinger过程的半经典处理
Semiclassical Treatment of Induced Schwinger Processes at Finite Temperature
摘要：
我们考虑有限温度下外场中的感生对产生。在Schwinger固有时间积分鞍点分析的框架内，半经典地计算了介子格林函数的单圈修正。这种修正似乎是指数小的逆温度依赖性。低温极限被证明是在与以前获得的零温度的结果完全一致。在低温极限的修正估计到领先的指数和指数前的条款。比较早期的真空衰减的计算。
英文摘要：
We consider induced pair production in an external field at finite temperature. One-loop correction to the Green function of a meson is calculated semiclassically within the framework of saddle-point analysis of Schwinger proper time integrals. This correction appears to be exponentially small in terms of inverse temperature dependence. Low-temperature limit is shown to be in full agreement with previously obtained zero-temperature results. The corrections in the low-temperature limits are estimated up to the leading exponential and pre-exponential terms. Comparison is made to earlier calculations of vacuum decay.
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