Correspondence between imaginary-time and real-time finite-temperature field theory.
Correspondence between imaginary-time and real-time finite-temperature field theory.
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DOI：
10.1103/physrevd.42.562
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发表时间：
1990-07
期刊：
影响因子：
--
通讯作者：
Kobes
中科院分区：
文献类型：
--
作者：
Kobes
众所周知，使用有限温度场理论的虚时形式主义发现的单粒子不可约图与实时形式主义的单粒子不可约图总体上不同。这里表明，在实时形式主义中，人们可以考虑由因果关系论证驱动的图的总和，这些图至少在许多简单的例子中与相应的分析连续虚时间结果一致。讨论了该图中多个统计因素的出现。
It is known that one-particle-irreducible graphs found using the imaginary-time formalism of finite-temperature field theory differ in general with those of the real-time formalism. Here it is shown that within the real-time formalism one can consider a sum of graphs, motivated by causality arguments, which at least in a number of simple examples agree with the corresponding analytically continued imaginary-time result. The occurrence of multiple statistical factors in this sum of graphs is discussed.