论文标题
在具有排斥相互作用的系统中，Bose-Einstein凝结现象学
Bose-Einstein condensation phenomenology in systems with repulsive interactions
论文作者
论文摘要
研究了排斥相互作用在BOSE颗粒统计系统中的作用。考虑了三个不同的现象学框架：平均场模型，一个排除的体积模型和具有介质依赖有效质量的模型。将所有三个模型调节以产生相似的状态方程，仅在小化学势下与理想的bose气体偏离。但是，我们的分析表明，这些模型导致bose-内施泰因冷凝现象的质量不同。我们讨论了这种现象的不同方面，即玻色 - 因斯坦凝结的发作，粒子数波的波动和玻色凝结的行为。获得的结果可能有助于解释在较小的温度和较大的同源化学潜力下的晶格QCD数据，以及高能核碰撞中多pion产生的数据。
The role of repulsive interactions in statistical systems of Bose particles is investigated. Three different phenomenological frameworks are considered: a mean field model, an excluded volume model, and a model with a medium dependent effective mass. All three models are tuned to yield similar equations of state, with only minor deviations from the ideal Bose gas at small chemical potentials. Our analysis indicates, however, that these models lead to qualitatively different results for the Bose-Einstein condensation phenomenon. We discuss the different aspects of this phenomenon, namely, an onset of the Bose-Einstein condensation, particle number fluctuations, and a behavior of the Bose condensate. The obtained results can be helpful for interpreting the lattice QCD data at small temperature and large isospin chemical potential and the data on multiple pion production in high energy nuclear collisions.
