HOW FAST CAN A QUANTUM STATE CHANGE WITH TIME

被引:169
作者
PFEIFER, P
机构
[1] Department of Physics and Astronomy, University of Missouri, Columbia
关键词
D O I
10.1103/PhysRevLett.70.3365
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Lower and upper bounds are derived for the decay and transitions of quantum states, evolving under a time-dependent Hamiltonian, in terms of the energy uncertainty of the initial and final state. The bounds are simultaneously a rigorous version of Fermi's golden rule and of the time-energy uncertainty relation. They are sharp, refer to short times, and are compared with recent long-time results for time-independent Hamiltonians. Illustrations for tunneling systems, laser-driven processes, and neutron interferometry in time-dependent magnetic fields are given.
引用
收藏
页码:3365 / 3368
页数:4
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