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On the General and Resonant Solutions of Atoms Reflected by an Evanescent Laser Wave

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Chinese Physics Letters 1996年第8期13卷 587-589页

作者： tan wei-han LI Qiang-ning Department of Physics Shanghai UniversityShanghai 200072 and Shanghai Institute of Optics and fine Mechanics Chinese Academy of SciencesShanghai 201800

Usually the reflection of two level atoms by a detuning evanescent laser wave was studied in past few years.1-3 In previous paper we have presented an exact solution for this model based on the matrix Laplace transformation technique,and proceeded the numerical calculations for a given set of parameters.4 However in the special case of resonance interaction considered in this paper,the solution for Schrödinger wave equation and reflectivity calculation can be greatly simplified;besides,the resonant solution provides a check to the numerical data based on the general solution of the previous paper.

关键词： parameters wave simplified

Resonance Fluorescence Spectrum by Two-Level System Without the Rotating Wave Approximation

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Chinese Physics Letters 1999年第1期16卷 23-25页

作者： LIU Ren-hong tan wei-han Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800 Department of Physics Shanghai UniversityShanghai 201800

In this paper the theory of resonance fluorescence spectrum by two-level system is presented without the assumption of rotating wave ***,in this case,the application of quantum fluctuation-regression theorem to evaluate the resonance fluorescence spectrum takes a more complicated *** prominent features of the spectrum calculated are the double splitting on the central and side bands and the emergence of harmonics in the asymmetric spectra.

关键词： spectra. spectrum Approximation

A Model for Macroscopic Quantum Tunneling of Bose-Einstein Condensate with Attractive Interaction

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Chinese Physics Letters 2000年第9期17卷 631-633页

作者： YAN Ke-Zhu tan wei-han Physics of Department Shanghai UniversityShanghai 201800

Based on the numerical wave function solutions of neutral atoms with attractive interaction in a harmonic trap,we propose an exactly solvable model for macroscopic quantum tunneling of a Bose condensate with attractive *** calculate the rate of macroscopic quantum tunneling from a metastable condensate state to the collapse state and analyze the stability of the attractive Bose-Einstein condensation.

关键词： interaction. attractive Einstein

Collapse and Revival in the Damped Jaynes-Cummings Model

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Chinese Physics Letters 1999年第12期16卷 896-898页

作者： tan wei-han YAN Ke-zhu Department of Physics Shanghai UniversityShanghai 201800

We present the first results for the analytic solution of the dissipative Jaynes-Cummings model and its application to the collapse and revival of atomic inversion. We find that the atomic inversion oscillates more and more slowly with decreasing Rabi frequency due to the cavity losses. At the same time, long drawn-out revivals after collapse are observed.

关键词： Cummings atomic analytic

Nonlinear Control of Chaos

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Chinese Physics Letters 1998年第4期15卷 249-251页

作者： LIU Ren-hong tan wei-han Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800 Department of Physics Shanghai UniversityShanghai 201800

The nonlinear and the exact control of chaos is *** these methods we achieve a simultaneous and instantaneous control of the scheduled unstable 2^(k)p points for the logistic and the Henon *** derivatives needed in the nonlinear method have been evaluated experimentally from the time series xn,without the pre-knowledge of the function f(x).The difficulty confronted in the optimum control may be overcome by introducing the nonlinear control.

关键词： nonlinear overcome Chaos

THE EFFECTS OF TRANSVERSE RELAXATION AND OPTICAL PUMPING ON THE RESONANCE FLUORESCENCE

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Chinese Physics Letters 1985年第7期2卷 309-312页

作者： tan wei-han ZhanG wei-ping Shanghai Institute of Optics and Fine Mechanics Academic Sinica Shanghai Anhui Institute of Optics and Fine Mechanics Academic Sinica Hefei

Although the resonance fluorescence spectrum of coherent light scattering from a two-level atom has been discussed in many papers,the effects of longitudinal,transverse relaxation and optical pumping have not yet been considered simultaneously in the motion *** solving the optical Bloch equations including the longitudinal relaxation time T_(1),transverse relaxation time T_(2) and optical pumping parameterΔ0,in the case T_(2)/T_(1)«1,we obtain the spectrum with dip in the central peak besides the familiar spectrum of three *** addition,we find that the parameter Δ_(0) and detuningΔωhave influence on the symmetry,height and width of the spectrum of the three peaks.

关键词： relaxation spectrum transverse

Brain region-specific roles of brain-derived neurotrophic factor in social stress-induced depressive-like behavior

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Neural Regeneration Research 2025年第1期20卷 159-173页

作者： Man han Deyang Zeng wei tan Xingxing Chen Shuyuan Bai Qiong Wu Yushan Chen Zhen wei Yufei Mei Yan Zeng Brain Science and Advanced Technology Institute Wuhan University of Science and TechnologyWuhanHubei ProvinceChina Geriatric Hospital Affiliated to Wuhan University of Science and Technology WuhanHubei ProvinceChina School of Public Health Wuhan University of Science and TechnologyWuhanHubei ProvinceChina

Brain-derived neurotrophic factor is a key factor in stress adaptation and avoidance of a social stress behavioral *** studies have shown that brain-derived neurotrophic factor expression in stressed mice is brain region–specific,particularly involving the corticolimbic system,including the ventral tegmental area,nucleus accumbens,prefrontal cortex,amygdala,and *** how brain-derived neurotrophic factor participates in stress processing in different brain regions will deepen our understanding of social stress *** this review,we discuss the expression and regulation of brain-derived neurotrophic factor in stress-sensitive brain regions closely related to the pathophysiology of *** focused on associated molecular pathways and neural circuits,with special attention to the brain-derived neurotrophic factor–tropomyosin receptor kinase B signaling pathway and the ventral tegmental area–nucleus accumbens dopamine *** determined that stress-induced alterations in brain-derived neurotrophic factor levels are likely related to the nature,severity,and duration of stress,especially in the above-mentioned brain regions of the corticolimbic ***,BDNF might be a biological indicator regulating stress-related processes in various brain regions.

关键词： amygdala chronic mild stress chronic social defeat stress corticolimbic system depression hippocampus medial prefrontal cortex nucleus accumbens social stress models ventral tegmental area

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含时的线性驱动简并参量放大系统的量子起伏

物理学报 2005年第10期54卷 4526-4531页

作者：赵超樱谭维翰上海大学物理系上海200444

导出在P表象中含时的线性驱动简并参量放大Fokker-Planck方程,并求其解.在阈值以下或阈值附近,含时驱动Fokker-Planck方程的解与线性理论或阈值附近的微扰理论预言的基本相符.在阈值以上,含时驱动Fokker-Planck方程解的短期行为也与线... 详细信息

导出在P表象中含时的线性驱动简并参量放大Fokker-Planck方程,并求其解.在阈值以下或阈值附近,含时驱动Fokker-Planck方程的解与线性理论或阈值附近的微扰理论预言的基本相符.在阈值以上,含时驱动Fokker-Planck方程解的短期行为也与线性近似解相近,但当τ增大后的长期行为完全区别于线性理论的结果.

关键词：含时的线性驱动简并参量放大 Fokker-Planck方程量子起伏线性驱动放大系统简并线性理论参量放大微扰理论线性近似

简谐势阱中具有吸引相互作用原子体系的玻色-爱因斯坦凝聚

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物理学报 2000年第10期49卷 1909-1911页

作者：闫珂柱谭维翰上海大学物理系上海201800

给出了简谐势阱中具有吸引相互作用原子体系的非线性定态薛定谔方程的基态解 ,得到了凝聚原子数随能量本征值变化的双稳态曲线 .并由此得到与实验报道相符的吸引型玻色

关键词：玻色-爱因期坦凝聚吸引相互作用原子体系