An Exactly Soluble Model of a Many‐Fermion System
作者： J. M. Luttinger
DOI: 10.1063/1.1704046
关键词: Fermion 、 Fermi surface 、 Many-body problem 、 Fermi gas 、 Ground state 、 Luttinger liquid 、 Perturbation (astronomy) 、 Classical mechanics 、 Physics
摘要: An exactly soluble model of a one‐dimensional many‐fermion system is discussed. The has fairly realistic interaction between pairs fermions. exact calculation the momentum distribution in ground state given. It shown that there no discontinuity this at Fermi surface, but infinite slope there. Comparison with results perturbation theory for same also presented, and it that, case least, answers behave qualitatively alike. Finally, response to external fields
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