Limitations of the single-active-electron approximation in quantum simulations of solid high-order harmonic generation

doi:10.1103/PhysRevA.98.043409

	Limitations of the single-active-electron approximation in quantum simulations of solid high-order harmonic generation
	Li, Jinbin 1,2; Fu, Silin 1,2; Wang, Huiqiao3 ; Zhang, Xiao 4,5; Ding, Baowei 1,2; Hu, Bitao 1,2; Du, Hongchuan 1,2
刊名	PHYSICAL REVIEW A
	2018-10-05
卷号	98
ISSN号	2469-9926
DOI	10.1103/PhysRevA.98.043409
英文摘要	We investigate the limitations of the single-electron time-dependent Schrodinger equation (TDSE) in the studies of solid high-order harmonic generation (HHG). Two main differences are found by comparing the harmonic spectra calculated by TDSE and semiconductor Bloch equations (SBEs) in the same conditions. One is that the spectrum obtained from SBEs only contains clear odd harmonics, but that derived from TDSE consists of even and odd harmonics. The other is that the two approaches derive different linear dependence of cutoff energy on electric strength and wavelengths of laser fields. These discrepancies can be attributed to the single-active-electron approximation used in TDSE. Moreover, we find that the phase mismatching between the dipole interaction and the intrinsic dynamical phase of the system is responsible for the generation of even harmonics in the single-active-electron approximation. Finally, an approach is proposed to expand the applicable range of TDSE further. Our results demonstrate that many-body effects must be taken into account in solid HHG simulations, though the Coulomb interaction between electrons can be neglected in some cases.
资助项目	Fundamental Research Funds for the Central University of China[lzujbky-2018-it35] ; Fundamental Research Funds for the Central University of China[lzujbky-2017-14]
WOS研究方向	Optics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000446551100005
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/64378]
专题	中国科学院近代物理研究所
通讯作者	Hu, Bitao; Du, Hongchuan
作者单位	1.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Gansu, Peoples R China 2.Lanzhou Univ, Minist Educ, Key Lab Special Funct Mat & Struct Design, Lanzhou 730000, Gansu, Peoples R China 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China 4.Lanzhou Univ, Ctr Interdisciplinary Studies, Lanzhou 730000, Gansu, Peoples R China 5.Lanzhou Univ, MoE, Key Lab Magnetism & Magnet Mat, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Li, Jinbin,Fu, Silin,Wang, Huiqiao,et al. Limitations of the single-active-electron approximation in quantum simulations of solid high-order harmonic generation[J]. PHYSICAL REVIEW A,2018,98.
APA	Li, Jinbin.,Fu, Silin.,Wang, Huiqiao.,Zhang, Xiao.,Ding, Baowei.,...&Du, Hongchuan.(2018).Limitations of the single-active-electron approximation in quantum simulations of solid high-order harmonic generation.PHYSICAL REVIEW A,98.
MLA	Li, Jinbin,et al."Limitations of the single-active-electron approximation in quantum simulations of solid high-order harmonic generation".PHYSICAL REVIEW A 98(2018).