Bounds to unitary evolution

被引：15

作者：

Andrews, Mark ^{[1
]}

机构：

[1] Australian Natl Univ, Fac Sci, Dept Phys, Canberra, ACT 0200, Australia

来源：

PHYSICAL REVIEW A | 2007年 / 75卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.75.062112

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Upper and lower bounds are established for the survival probability parallel to <psi(0)parallel to psi(t)>parallel to(2) of a quantum state, in terms of the energy moments <psi(0)parallel to H-n parallel to psi(0)>. Introducing a cutoff in the energy generally enables considerable improvement in these bounds and allows the method to be used where the exact energy moments do not exist.

引用

页数：5

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