任意温度下的非相对论磁化矢量玻色子气体
A non-relativistic magnetized vector boson gas at any temperature
摘要：
我们研究了中性矢量玻色子气体在恒定磁场存在下的热力学性质，通过一个半经典的方法，允许在非相对论谱的玻色子自旋。得到了玻色-爱因斯坦凝聚，并证明了它依赖于所有的参数：温度，粒子密度和磁场。在低温下，由于凝聚态的存在，出现了自发磁化。由磁场的存在在系统中施加的轴对称性将压力分成两个分量，一个沿着磁轴，另一个垂直于磁轴。在某些条件下，垂直压力变为负信号，表明系统经历横向磁塌缩。自发磁化可能有助于模拟致密恒星内部的磁场产生，而负压对这些物体内部支持给定磁场所需的温度和密度施加了一定的限制。
英文摘要：
We study the thermodynamic properties of a neutral vector boson gas in presence of a constant magnetic field, by means of a semi-classical approach that allows to introduce the spin in the non-relativistic spectrum of the bosons. Bose-Einstein condensation is obtained and it turns out to depend on all the parameters involved in the problem: temperature, particle density and magnetic field. An spontaneous magnetization appears at low temperature as a consequence of the condensed state. The axial symmetry imposed in the system by the magnetic field presence, splits the pressure in two components, one along and another perpendicular to the magnetic axis. Under certain conditions, the perpendicular pressure becomes negative signaling that the system undergoes a transversal magnetic collapse. The spontaneous magnetization might be useful to model magnetic field production inside compact stars, while the negative pressures imposes certain limits to the temperatures and densities needed inside these objects to support a given magnetic field.
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