微正则系综中扩展体的量子场传播子和S-矩阵
Quantum field propagator for extended-objects in the microcanonical ensemble and the S-matrix formulation
摘要：
从著名的N-扩展体系统的Nambu-Goto作用量出发，显式计算了微正则系综中的传播子。该传播器与温度无关，并且与先前的参考文献相比，考虑了由扩展对象产生的所有非局部效应（例如，字符串）的交互。建立并分析了微正则方法中相对论性量子场论与纯S矩阵方法之间的关系。
英文摘要：
Starting with the well-known Nambu-Goto action for an N-extended body system the propagator in the microcanonical ensemble is explicitly computed. This propagator is independent of the temperature and, in contrast with the previous references, takes account on all the non-local effects produced by the extended objects (e.g., strings) in interaction. The relation between relativistic quantum field theories in the microcanonical approach and the pure S-matrix formulation is stablished and analyzed.
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