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arXiv 0801.0721quant-ph
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具有单个局部执行器的全局能控性

Global controllability with a single local actuator

Sonia G. Schirmer, Ivan C. H. Pullen, Peter J. Pemberton-Ross

摘要:

我们表明,我们可以实现全局密度算子的可控性,大多数N维双线性哈密顿控制系统与一般固定耦合使用一个单一的,本地代理的致动器,调制一个能级跃迁。可控性取决于致动器的位置,并依赖于没有分解成非相互作用的子群或对称性限制的动力学SU(N)的一个子群。这些结果被应用到自旋链系统,并用于显式地构建一个单一的二进制值开关执行器的控制序列。

英文摘要:

We show that we can achieve global density-operator controllability for most N-dimensional bilinear Hamiltonian control systems with general fixed couplings using a single, locally-acting actuator that modulates one energy-level transition. Controllability depends upon the position of the actuator and relies on the absence of either decompositions into non-interacting subgroups or symmetries restricting the dynamics to a subgroup of SU(N). These results are applied to spin-chain systems and used to explicitly construct control sequences for a single binary-valued switch actuator.

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