1995/02/08 by O. W. Greenberg, Greenberg, O. W.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #Physics of Superconductivity and Magnetism
paper · pdf · doi:10.48550/arxiv.hep-ph/9502253
openalex publication_date 1995/02/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
I survey the use of the Haag expansion as a technique to solve quantum field theories. After an exposition of the asymptotic condition and the Haag expansion, I report the results of applying the Haag expansion to several quantum field theories, including galilean-invariant theories, matter at finite temperature (using the BCS model of superconductivity as an illustrative example), the Nambu--Jona-Lasinio model and the Schwinger model. I conclude with the outlook for further development of this method.