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arXiv 0908.1048quant-ph
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利用李雅普诺夫控制将量子系统驱动到无消相干子空间

Driving Quantum System into Decoherence-free Subspaces by Lyapunov Control

X. X. Yi, X. L. Huang, Chunfeng Wu, C. H. Oh

摘要:

提出了一种利用李雅普诺夫控制将有限维量子系统驱动到无消相干子空间的方案。利用李雅普诺夫函数建立控制场。该方案对于封闭和开放量子系统都很有效,对于封闭系统,用期望的子空间代替DFS。以三束激光驱动三个简并态的四能级系统为例,对该方案的动力学特性进行了数值模拟,得到了较好的结果。

英文摘要:

We present a scheme to drive a finite-dimensional quantum system into the decoherence-free subspaces(DFS) by Lyapunov control. Control fields are established by Lyapunov function. This proposal works well for both closed and open quantum systems, with replacing the DFS by desired subspaces for closed systems. An example which consists of a four-level system with three degenerate states driven by three lasers is presented to gain further insight of the scheme, numerical simulations for the dynamics of the system are performed and the results are good.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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