Density matrix renormalization group study of ultrasmall superconducting grains

被引：115

作者：

Dukelsky, J

Sierra, G

机构：

[1] CSIC, Inst Estructura Mat, E-28006 Madrid, Spain

[2] CSIC, Inst Matemat & Fis Fundamental, Madrid, Spain

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.83.172

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We apply the density matrix renormalization group (DMRG) method to the BCS pairing Hamiltonian which describes ultrasmall superconducting grains. Our version of the DMRG uses the particle (hole) states around the Fermi level as the system block (environment). We observed a smooth logarithmic-like crossover between the few electron regime and the BCS-bulk regime.

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页码：172 / 175

页数：4

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