科研之友
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摘要
Calculations of the electronic structure of strongly correlated systems carried out by the slave-boson method are compared with exact numerical solutions for finite clusters. The ''slave-boson'' method is found to be a very good approximation for studying not only the single-band Hubbard model but also multiband Hubbard models. It yields the characteristics of the ground state within an error similar to 1%. The reasons for the large discrepancy observed previously [S. N. Molotkov et al., JETP Lett. 59, 847 (1994)] between the slave-boson results and the exact solution are identified.
- 出版日期1995-6-10
