Exact Analysis of a δ-Function Spin-1/2 Attractive Fermi Gas with an External Magnetic Field(General)
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概要
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We study the excitation spectrum of a one-dimensional δ-function attractive spin-1/2 fermions by the thermal Bethe ansatz method at zero temperature. The integral equation for the dressed energies of the system with an external magmatic field is solved in the form of power series. The first few terms of the asymptotic expansions for both strong and weak coupling cases are calculated analytically. We also study the magnetization as a function of the coupling constant and the external field.
- 社団法人日本物理学会の論文
- 2008-02-15
著者
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Wadati Miki
Department Of Physics Faculty Of Science University Of Tokyo
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Wadati Miki
Department Of Physics Faculty Of Science Tokyo University Of Science
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Iida Toshiaki
Department Of Physics Faculty Of Science Tokyo University Of Science
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Iida Toshiaki
Department Of Bioproduction Faculty Of Agriculture Yamagata University
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