大学物理实验教学的改革构想

基于高校物理实验教学现状,文章针对当前大学物理实验教学模式中的弊端进行分析,认为物理实验教学要从教学模式上创新,切实提升大学物理实验教学质量与效率,培养学生的思维创新能力。

基于两节点间信息互传的量子特性

运用全量子理论,对腔耦合系统构建的两个节点,考虑节点内腔模与量子位(qubit)的耦合,结合数值计算,用熵表示信源的不确定性,对信源发出的信息进行度量,研究了两个节点相互进行信息传输过程的熵演化.通过两能级粒子与腔模的耦合强度、腔-腔之间的跃迁耦合系数和失谐量三个参数对熵变化进行分析,结论表明在共振条件下,节点间相互传输信息过程中,耦合双腔构成的两个节点熵呈现准周期性坍塌与复苏振荡变化特征,节点1与节点2熵的峰值交替出现;两个节点之间用跳跃频率λ/2π的光子作为信息传送的数椐总线,失谐使两个节点内量子位的一个频率高,一个频率低,无论先操纵哪一个量子位,在系统稳定工作状态下,量子态演化的信息传递方向总是从频率快的量子位向频率慢的量子位传递,此特性可扩展至多量子位之间量子信息的传递.用于两个节点间的远程操控.

高等量子力学课程教学改革与建设措施研究

高等量子力学是物理学各专业硕士研究生必修专业基础课之一,是公认的教师难教、学生难学的课程,该课程教学效果的好坏与学生日后的科学研究联系紧密。本文从教学内容、教学方法、教学模式以及教学手段等方面探讨高等量子力学课程的教学改革,并给出该课程的建设措施以及建设成效。

不动产统一登记的难点与对策——湖南澧县试点的经验总结

自湖南省开展不动产统一登记试点工作以来,澧县不动产统一登记已进入全面实施阶段。该文扼要叙述了澧县不动产统一登记的推进进程,分析了不动产统一登记的难点,并从总结试点经验入手,探析需要把握的组织机构、岗位设置、工作衔接、资料移交等工作要点,提出了湖南全面开展不动产登记工作的建议。

周期调制倾斜光晶格中单粒子混沌输运特性

研究周期调制倾斜光晶格中单粒子的混沌动力学行为,在强调制强度情形下探讨了混沌对粒子量子输运的影响.仿真分析结果表明,只有当调制频率与晶格倾斜度相匹配时,才会发生混沌帮助量子隧穿现象,否则混沌帮助局域化.外场调制方法能有效地操控粒子的量子输运.

大学物理教学中学生物质微粒观的培养

文章以大学物理教学中学生物质微粒观的培养为主题,结合教学实践中遇到的问题,提出了大学物理教学中物质微粒观培养的教学策略。这些观点和方法对大学物理教学实践具有一定的指导意义。

双频周期调制光晶格中单粒子的混沌动力学

论文主要研究了一维光晶格中单粒子在双频周期调制下的混沌动力学。通过数值分析不同调制参数下的庞加莱截面,发现依赖于占比参数和相位,倍频调制既可导致原来处于高混沌区域的相空间中出现规则岛,也可使体系更容易进入高混沌区域,并对混沌与量子隧穿的关系进行研究,发现双频调制可引起分数共振隧穿。

Nonlinear dissipative dynamics of a two-component atomic condensate coupling with a continuum

We investigate the nonlinear dissipative coherence bifurcation and population dynamics of a two-component atomic Bose-Einstein condensate coupling with a continuum. The coupling between the two-component condensates and the continuum brings effective dissipations to the two-component condensates. The steady states and the coherence bifurcation depend on both dissipation and the nonlinear interaction between condensed atoms. The coherence among condensed atoms may be even enhanced by the effective dissipations. The combination of dissipation and nonlinearity allows one to control the switching between different self-trapped states or the switching between a self-trapped state and a non-self-trapped state.

“3+1+2”高考模式下大学物理教学的改革与探索

新的"3+1+2"高考模式下,物理所占的比重增加,物理学科的考试内容与要求有了新的变化,从而导致大学物理教学也将产生非常大的变化。针对这些变化,本文提出了开设大学物理预修课、分级教学、教学模式创新以及成绩考核多元化等改革措施,切实提升大学物理教学质量与效率,培养学生的创新能力。

Floquet Bound States in a Driven Two-Particle Bose-Hubbard Model with an Impurity

We investigate how the driving field affects the bound states in the one-dimensional two-particle Bose-Hubbard model with an impurity. In the high-frequency regime, compared with the static lattice [Phys. Rev. Lett. 109 （2012） 116405], a new type of Floquet bound state can be obtained even for a weak particle-particle interaction by tuning the driving amplitude. Moreover, the localization degree of the F1oquet bound molecular state can be adjusted by tuning the driving frequency, and even the Floquet bound molecular state can be changed into the Floquet extended state when the driving frequency is below a critical value. Our results provide an efficient way to manipulate bound states in the many-body systems.

关于加强电脑对公业务管理的几点建议

近年来,随着社会主义经济建设的不断发展,电脑处理银行业务已经在各级行逐步发展起来了。电脑处理对公业务,使相当部分工作人员得以从繁重的手工操作中解脱出来,既提高了农业银行的知名度,又增强了自身的竞争能力。同时,也给农业银行的内部管理工作提出了更高的要求。现在就电脑对公业务管理问题,提出几点建议。一、重视培训电脑操作人员农行利用电子计算机处理银行业务,尚属起步阶段,电脑操作员的素质则是农行利用电脑处理对公业务的关键。对于一个合格的电脑操作员来说,不但要具备良好的职业道德,还必须具有较高的业务水平和技能。因此,要通过培训,使电脑操作员较系统地掌握电子计算机的基本知识,并能处理一些常见性的机器故障,系统故障,错帐的处理,以及电脑的保养等等。

Collision Dynamics of Dissipative Matter-Wave Solitons in a Perturbed Optical Lattice

We investigate the stability and collision dynamics of dissipative matter-wave solitons formed in a quasi-one- dimensional Bose-Einstein condensate with linear gain and three-body recombination loss perturbed by a weak optical lattice. It is shown that the linear gain can modify the stability of the single dissipative soliton moving in the optical lattice. The collision dynamics of two individual dissipative matter-wave solitons explicitly depend on the linear gain parameter, and they display different dynamical behaviors in both the in-phase and out-of-phase interaction regimes.

Chaotic matter shock wave of an open system

We investigate a one-dimensional open Bose-Einstein condensate with attractive interaction, by considering the effect of feeding from nonequilibrium thermal cloud and applying the time-periodic inverted-harmonic potential. Using the direct perturbation method and the exact shock wave solution of the stationary Gross Pitaevskii equation, we obtain the chaotic perturbed solution and the Melnikov chaotic regions. Based on the analytical and the numerical methods, the influence of the feeding strength on the chaotic motion is revealed. It is shown that the chaotic regions could be enlarged by reducing the feeding strength and the increase of feeding strength plays a role in suppressing chaos. In the case of ＂nonpropagated＂ shock wave with fixed boundary, the number of condensed atoms increases faster as the feeding strength increases. However, for the free boundary the metastable shock wave with fixed front density oscillates its front position and atomic number aperiodically, and their amplitudes decay with the increase of the feeding strength.

深化拓展“三争”行动 推动“四领一促”工作

龙年伊始,三明市召开深化拓展“三争”行动、推动“四领一促”工作动员部署大会,吹响了加快三明革命老区高质量发展的冲锋号。建宁县政协坚决贯彻、迅速行动,不断强化一线担当作为,努力在落实深化拓展“三争”行动、推动“四领一促”工作中发挥政协独特作用。

深化“六抓六破解” 践行基层协商民主

习近平总书记指出:“涉及人民群众利益的大量决策和工作,主要发生在基层。要按照协商于民、协商为民的要求,大力发展基层协商民主,重点在基层群众中开展协商。”建宁县政协深入贯彻落实习近平总书记关于加强和改进人民政协工作的重要思想,围绕深化基层协商议政“六抓六破解”,创新开展不同层次的协商议事活动,助力高质量发展、服务老百姓关切,有力地推动了协商民主在基层的实践和传播。

激光脉冲作用下囚禁离子在Lamb-Dicke区域精确的量子运动

研究驻波型激光脉冲作用下,囚禁于Paul阱中的单离子在Lamb-Dicke区域的久期运动.通过试探解方法,得到系统的量子力学精确解.基于精确解描述的概率波包串,发现:1)波包串中心以及波包串的高度和宽度受激光脉冲强度的控制,通过调节激光强度可以控制波包串的形变和传播;2)在激光脉冲作用瞬间,离子的能量期待值发生跳变,而在激光关闭时段,有窄的能带形成;3)存在一个激光脉冲强度的临界值,在临界点附近,系统的稳定性发生变化.

全面加强党的建设 精准促进履职实践

一年来,建宁县政协党组坚持党建工作和履职工作一起谋划、一起部署、一起考核,结合建宁实际,探索深化政协系统党建引领行动,创新工作模式,精准履职实践,推动政协党建工作落地落实,不断增强政协履职影响力。强化政治建设,“党的领导”更加有力。县政协党组坚持党对政协工作的全面领导,年初制定出台了深化党建引领具体行动方案,进一步强化政协系统党的政治建设、组织建设、作风建设,全面融入建宁全方位高质量发展超越。

Stationary States and Modulational Instability of Coupled Two-Component Bose–Einstein Condensates in a Ring Trap

We investigate modulational instability(MI) of a coupled two-component Bose–Einstein condensates in a rotating ring trap. The excitation spectrum and the MI condition of the system are presented analytically. We find that the coupling between the two components strongly modifies the MI condition, and the MI condition is phase-dependent.Furthermore, we discuss the effect of MI on both density excitation and spin excitation. If the inter- and intra-component interaction strengths are all equal, the MI causes density excitation but not spin excitation, and if the inter- and intracomponent interaction strengths are different, the MI causes both density excitation and spin excitation. Our results provide a promising approach for controlling the stability and excitation of a rotating two-component Bose–Einstein condensates by modulating its coupling strength and interaction strength.

Clock frequency estimation under spontaneous emission

We investigate the quantum dynamics of a driven two-level system under spontaneous emission and its application in clock frequency estimation. By using the Lindblad equation to describe the system, we analytically obtain its exact solutions, which show three different regimes： Rabi oscillation, damped oscillation, and overdamped decay. From the analytical solutions, we explore how the spontaneous emission affects the clock frequency estimation. We find that under a moderate spontaneous emission rate, the transition frequency can still be inferred from the Rabi oscillation. Our results enable potential practical applications in frequency measurement and quantum control under decoherence.

Dynamic fragmentation in a quenched two-mode Bose-Einstein condensate

We investigate the fragmentatiion in a two-mode Bose-Einstein condensate with Josephson cou- pling. We explore how the fragmentation and entropy of the ground state depend on the intermode asymmetry and interparticle interactions. Owing to the interplay between the asymmetry and the interactions, a sequence of notches and plateatus in the fragraentution appears with the single-atom tunneling and interaction blockade, respectively. We then analyze the dynamical properties of the fragmentation in three typical quenches of the asymmetry： linear, sudden, and periodic quenches. In a linear quench, the final sta,~e is a fragmented state due to the sequential Landau-Zener tunnel- ing, which can be analytically explained by applying the two-level Landau-Zener formula for each avoided level crossing. In a sudden quench, the fragmentation exhibits persistent fluctuations that sensitively depend on the interparticle interactions and interrnode coupling. In a periodic quench, the fragmentation is modulated： by the periodic driving, and a suitable modulation may allow one to control the fragmentation.