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系统科学与数学

SU(1,1)型双输入量子系统能量最优控制

吴建武, 李春文, 张婧

Published Jan 1, 2007• 0 citations
OpenAlex

Abstract

基于极大值原理,讨论了在李群SU(1,1)上演化的量子系统的能量最优控制问题,针对正常极值和非正常极值两种不同情形,分别给出了双输入时最优控制的解析表达式,所研究的系统是一类在非紧李群上演化的典型量子系统,可用其来描述大量实际物理问题.

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Acta Physica Sinica•Jan 1, 1996•0 citations
基于极大值原理,讨论了在李群SU(1,1)上演化的量子系统的能量最优控制问题,针对正常极值和非正常极值两种不同情形,分别给出了双输入时最优控制的解析表达式,所研究的系统是一类在非紧李群上演化的典型量子系统,可用其来描述大量实际物理问题.
本文首先讨论了Barut-Girardello SU(1,1)相干叠加态在Bargmann指数K≠1/2时的二阶量子关联特性。发现随着Bargmann指数的增大,Barut-Girardello奇相干态呈现反关联的区域变大。然后提出并研究了Peremolov SU(1,1)相干叠加态,Peremolov奇相干态可呈现反关联,并且随着Bargmann指数的增加,反关联程度变弱,反关联区域变小。
Standing on the results for the minimum weight states obtained in the previous paper (I), an idea how to construct the linearly independent basis is proposed for the su(n)-Lipkin model. This idea starts in setting up m independent su(2)-subalgebras in the cases with n=2m and n=2m+1 (m=2,3,4,...). The original representation is re-formed in terms of the spherical tensors for the su(n)-generators built under the su(2)-subalgebras. Through this re-formation, the su(m)-subalgebra can be found. For constructing the linearly independent basis, not only the su(2)-algebras but also the su(m)-subalgebra play a central role. Some concrete results in the cases with n=2, 3, 4 and 5 are presented.