Anharmonic effect of adiabatic quantum pumping

doi:10.1007/s11467-013-0394-9

Front. Phys.

2014, Vol. 9

Issue (2) : 164-169 https://doi.org/10.1007/s11467-013-0394-9

Anharmonic effect of adiabatic quantum pumping

Wei-Yin Deng (邓伟胤), Ke-Ju Zhong (钟克菊), Rui Zhu (朱瑞), Wen-Ji Deng (邓文基,

)

Department of Physics, South China University of Technology, Guangzhou 510640, China

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Abstract

Based on the scattering matrix approach, we systematically investigate the anharmonic effect of the pumped current in double-barrier structures with adiabatic time-modulation of two sinusoidal AC driven potential heights. The pumped current as a function of the phase difference between the two driven potentials looks like to be sinusoidal, but actually it contains sine functions of double and more phase difference. It is found that this kind of anharmonic effect of the pumped current is determined combinedly by the Berry curvature and parameter variation loop trajectory. Therefore small ratio of the driving amplitude and the static amplitude is not necessary for harmonic pattern in the pumped current to dominate for smooth Berry curvature on the surface within the parametervariation loop.

Keywords quantum pumping anharmonic effect Berry curvature instant scattering matrix expansion

Corresponding Author(s): Wen-Ji Deng (邓文基),Email:phwjdeng@scut.edu.cn

Issue Date: 01 April 2014

Cite this article:

Wei-Yin Deng (邓伟胤),Ke-Ju Zhong (钟克菊),Rui Zhu (朱瑞), et al. Anharmonic effect of adiabatic quantum pumping[J]. Front. Phys. , 2014, 9(2): 164-169.

URL:

https://academic.hep.com.cn/fop/EN/10.1007/s11467-013-0394-9
https://academic.hep.com.cn/fop/EN/Y2014/V9/I2/164

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