将高能物理前沿进展融入本科教学的创新探索

高能物理是研究物质微观结构最前沿的学科,能够影响物理学的各个分支。将高能物理的前沿进展融入当前粒子物理相关课程的教学中,对教学知识体系进行补充与整合,有益于深化学生对量子力学、电动力学和理论力学知识的理解,拓展关于前沿科技的知识面,提高参与科研活动的积极性和粒子物理专业毕业论文的质量。入选相关课程的前沿热点需要被广泛认可、难度适宜并与现有体系相关联。在粒子物理导论课程中,可以引入希格斯波色子、缪子反常磁矩、波色子质量和引力波方面的最新实验和理论进展。

机电接口技术与机电一体化发展探讨

机电一体化系统是机械系统通过不断地融合新技术而发展起来的。因此,对机电一体化研究的重点应放在此技术在机械技术上的创新和发展。通过探讨研究机电一体化系统中的接口问题上,发展接口技术,能使系统中信息的交互和能量的传递和变送更加顺利,有机地结合系统各个部分各个要素,使其作为一个完整的系统运作。接口问题的深入研究能大大推动接口技术的发展,接口技术的大力发展必然会使得机电一体化以及机电一体化系统理论的大步发展。

Locating the QCD critical end point through peaked baryon number susceptibilities along the freeze-out line

We investigate the baryon number susceptibilities up to fourth order along different freeze-out lines in a holographic QCD model with a critical end point（CEP）, and we propose that the peaked baryon number susceptibilities along the freeze-out line can be used as a clean signature to locate the CEP in the QCD phase diagram.On the temperature and baryon chemical potential plane, the cumulant ratio of the baryon number susceptibilities（up to fourth order） forms a ridge along the phase boundary, and develops a sword-shaped ＂mountain＂ standing upright around the CEP in a narrow and oblate region. The measurement of baryon number susceptibilities from heavy-ion collision experiments is along the freeze-out line. If the freeze-out line crosses the foot of the CEP mountain, then one can observe the peaked baryon number susceptibilities along the freeze-out line, and the kurtosis of the baryon number distributions has the highest magnitude. The data from the first phase of the beam energy scan program at the Relativistic Heavy Ion Collider indicates that there should be a peak of the kurtosis of the baryon number distribution at a collision energy of around 5 Ge V, which suggests that the freeze-out line crosses the foot of the CEP mountain and the summit of the CEP should be located nearby, around a collision energy of 3–7 GeV.

The entanglement properties of holographic QCD model with a critical end point

We investigated different entanglement properties of a holographic QCD(hQCD)model with a critical end point at the finite baryon density.Firstly,we considered the holographic entanglement entropy(HEE)of this hQCD model in a spherical shaped region and a strip shaped region.It was determined that the HEE of this hQCD model in both regions can reflect QCD phase transition.Moreover,although the area formulas and minimal area equations of the two regions were quite different,the HEE exhibited a similar behavior on the QCD phase diagram.Therefore,we assert that the behavior of the HEE on the QCD phase diagram is independent of the shape of the subregions.However,the HEE is not an ideal parameter for the characterization of the entanglement between different subregions of a thermal system.As such,we investigated the mutual information(MI),conditional mutual information(CMI),and the entanglement of purification(Ep)in different strip shaped regions.We determined that the three entanglement quantities exhibited some universal behavior;their values did not change significantly in the hadronic matter phase but increased rapidly with the increase in T andμin the QGP phase.Near the phase boundary,these three entanglement quantities changed smoothly in the crossover region and continuously but not smoothly at CEP;they exhibited discontinuous behavior in the first phase transition region.These properties can be used to distinguish between the different phases of strongly coupled matter.