Artículos de revistas
Improved effective-range expansions for small and large values of scattering length
Fecha
2018-08-14Registro en:
European Journal of Physics, v. 39, n. 5, 2018.
1361-6404
0143-0807
10.1088/1361-6404/aad620
2-s2.0-85053139291
2-s2.0-85053139291.pdf
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
The textbook effective-range expansion of scattering theory is useful in the analysis of low-energy scattering phenomenology when the scattering length |a| is much larger than the range R of the scattering potential: |a| ≫ R. Nevertheless, the same has been used for systems where the scattering length is much smaller than the range of the potential. We suggest and numerically study an effective-range expansion for |a| ≪ R as well as improved twoparameter effective-range expansions for the cases |a| > R and |a| < R. The improved effective-range expansions for |a| > R and |a| < R reduce to the expansions for |a| R ≫ 1 and |a| R ≪ 1, respectively, in appropriate limits.