Effect of antibound states in single barrier tunneling -: art. no. 024103

被引：2
|
作者：
García-Calderón, G
Villavicencio, J
机构：
[1] Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
[2] Univ Autonoma Baja California, Fac Ciencias, Ensenada 22800, Baja California, Mexico
来源：
PHYSICAL REVIEW A | 2005年 / 71卷 / 02期
关键词：
D O I：
10.1103/PhysRevA.71.024103
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
It is demonstrated that for very thin or very shallow rectangular barriers the transmission amplitude possesses an antibound pole situated very close to threshold energy. The transmission coefficient and the delay time at very low incidence energies may be expressed analytically in terms of the antibound pole contribution, which accounts, respectively, for the enhancement of the transmittivity to almost a unity value and for the large delay time exhibited by these systems. The large delay time caused by the antibound pole represents a type of "trapping" mechanism different from that of resonant tunneling.
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页数：4
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