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二阶量子路径的相干控制

Coherent Control of Multiple 2nd-Order Quantum Pathways (cited:1)

  • 摘要: 研究了有N个中间能级连接初态和目标态的情况下量子路径的控制策略.以N=3的量子体系为例,详细阐述了针对弱的宽频场的4N分块控制方案,其中分块的边界频率依赖于量子体系的共振频率.此策略利用了路径幅度中共振和非共振项的相干效应,可通过只调节2N个相位变量实现.

     

    Abstract: The manipulation of two 2nd-order quantum pathways has been successfully demonstrated experimentally in atomic Rubidium. This work would explore the coherent control of path-ways in the quantum system with N intermediate states connecting the initial and target states. A 4N-block scheme is proposed to control the N 2nd-order pathways which are driven by a weak broadband pulse. The model with N=3 is given as an example to demonstrate our strategy. In this scheme, boundaries of the spectral blocks are functions of the resonant frequencies, and the resonant and non-resonant contributions interfere mutually to achieve the quantum pathway control e ectively. The simple strategy may provide a practical choice for pathway manipulation experiments since there are only 2N phase variables to adjust.

     

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