标题： 闭弦高温行为的研究 显示英文标题

标题： On the High-Temperature Behaviour of the Closed Superstring

摘要： 研究了闭弦单圈自由能的高温展开。 获得了Laurent级数表示，并对其求和进行了解析延拓，以探究临界（Hagedorn）温度的本质。 结果发现，超过这个临界温度后，自由能的统计求和贡献是有限的，但具有虚部，表明系统可能存在亚稳态。 显示英文摘要

摘要： The high-temperature expansion for closed superstring one-loop free energy is studied. The Laurent series representation is obtained and its sum is analytically continued in order to investigate the nature of the critical (Hagedorn) temperature. It is found that beyond this critical temperature the statistical sum contribution of the free energy is finite but has an imaginary part, signalling a possible metastability of the system.