Manifest causality in quantum field theory with sources and detectors

被引：4

作者：

Dickinson, Robert ^{[1
]}

Forshaw, Jeff ^{[1
]}

Millington, Peter ^{[1
,2
]}

Cox, Brian ^{[3
]}

机构：

[1] Univ Manchester, Sch Phys & Astron, Consortium Fundamental Phys, Manchester M13 9PL, Lancs, England

[2] Univ Durham, Inst Particle Phys Phenomenol, Durham DH1 3LE, England

[3] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2014年 / 06期

关键词：

Quantum Field Theory; Thermal Field Theory; FINITE-TEMPERATURE; GREEN-FUNCTIONS; DISCONTINUITIES; DENSITY; RULES;

D O I：

10.1007/JHEP06(2014)049

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We introduce a way to compute scattering amplitudes in quantum field theory including the effects of particle production and detection. Our amplitudes are manifestly causal, by which we mean that the source and detector are always linked by a connected chain of retarded propagators. We show how these amplitudes can be derived from a path integral, using the Schwinger-Keldysh "in-in" formalism. Focussing on phi(3) theory, we confirm that our approach agrees with the standard S-matrix approach in the case of positive energy plane-wave scattering.

引用

页码：1 / 25

页数：25

共 15 条

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