大学物理 ›› 2013, Vol. 32 ›› Issue (9): 28-28.

• 著者文摘 • 上一篇    下一篇

从二次量子化角度看一维无限深方势阱问题

张宇 潘峰   

  1. 辽宁师范大学物理系,辽宁大连116029
  • 出版日期:2013-09-25 发布日期:2013-09-20

One-dimensional infinite square well in second quantization

  • Online:2013-09-25 Published:2013-09-20

摘要: 在二次量子化表象中,利用有限玻色子数N的截断近似研究了一维无限深方势阱问题的近似解.结果表明,在该近似方案中,阱宽参数平方a2和截断参数N成正比.当N是充分大的有限值(N≥1000)时,至少对低激发态,有限N截断近似的结果与精确解的结果基本一致.

关键词: 无限深方势阱, 二次量子化, 有限N截断近似

Abstract: In second quantization formalism, finite-N truncation is applied in solving one-dimensional infinite square well problem. The results show that square of the well width parameter a2 is proportional to the truncation parameter N. When N is large enougn( N ≥ 1 000) , results from the finite-N truncation, at least for low-lying states, are in good agreement to those of exact solution.

Key words: Infinite square well, second quantization, finite-N truncation

中图分类号: 

  • O413.1