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Photodetachment dynamics of negative ion confined in a time-dependent quantum well

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Abstract

We investigate the photodetachment dynamics of negative ion confined in a time-dependent trap created by a quantum well with an oscillating wall for the first time. Compared with the photodetachment of negative ion in a quantum well with static walls, the movement of the detached electron becomes substantially complicated and interesting as one wall in the quantum well oscillates with time. The position–time plot of the detached electron in the quantum well shows a fractal structure of asymptotic self-similarity due to the influence of the oscillating wall. The returning kinetic energy of the detached electron may have been accelerated to high energy by colliding with the oscillating wall. By calculating the photodetachment cross section of this system, we find that the oscillating wall in the quantum well functions as an external driving potential for the photodetachment of negative ion. The photodetachment cross section becomes increasingly complicated due to the influence of the oscillating wall. In addition, the amplitude, initial phase, and the initial position of the oscillating wall all affect the photodetachment cross section of this system. Our study may guide future experimental investigations on the photodetachment dynamics in the ion trap.

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Acknowledgements

This work was supported by the Natural Science Foundation of Shandong Province, China (Grant No. ZR2019MA066), National Natural Science Foundation of China (Grant No. 11374133), and Taishan Scholars Project of Shandong Province (Grant No. ts2015110055).

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Authors and Affiliations

  1. School of Physics and Optoelectronic Engineering, Ludong University, Yantai, 264025, China

    Tong Shi, De-Hua Wang & Xin-Yue Sun

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  1. Tong Shi
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  2. De-Hua Wang
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  3. Xin-Yue Sun
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Correspondence to De-Hua Wang.

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Shi, T., Wang, DH. & Sun, XY. Photodetachment dynamics of negative ion confined in a time-dependent quantum well. Indian J Phys 95, 551–560 (2021). https://doi.org/10.1007/s12648-020-01721-7

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