摘要
研究了Einstein-Euler-Heisenberg(EEH)AdS时空在扩展相空间中的冷却-加热相变。首先,根据扩展相空间中的热力学量,推导出冷却-加热系数、反转曲线方程和等焓曲线方程。接着,在温度-压强平面上绘制了反转曲线和等焓曲线,分析了各参数对冷热相变的影响。通过反转曲线图像可以看出,在一定压强下,欧拉-海森堡参数a保持不变时,温度随电荷的增大而增大。且在压强和电荷一定时,参数a越大,反转温度曲线也越高。此外,还分析了各参数对等焓曲线的影响。通过绘制质量,电荷以及参数a均为常数时的等焓曲线发现:在相同压强下,随电荷的增大,等焓曲线呈现向下塌缩的趋势,即随着电荷的增大,冷热相变的相变点逐渐减小;随参数a值的增大,冷热相变的相变点也逐渐减小。
The cooling-heating phase transition of Einstein-Euler-Heisenberg(EEH)AdS space time in extended phase space is studied in this paper.Firstly,cooling-heating coefficients,inversion curve equations and isenthalpic curve equations are derived from the thermodynamic quantities in extended phase space.Then,the inversion curve and isenthalpic curve are plotted on the Temperature-Pressure plane to analyze the influence of parameters on the cooling-heating phase transition.By inverting the curve image,it can be seen that,for fixed pressure and the Euler-Heisenberg theoretical parameters a,the temperature increases with the increase of the charge.When the pressure and charge are fixed,the higher the parameter a is,the higher the inversion temperature curve is.In addition,we also analyze the influence of each parameter on the equivalent enthalpy curve.By drawing the isenthalpic curve when the mass,charge and parameter a are all constant,it is found that under the same pressure,the isenthalpic curve presents a downward trend of collapse with the increase of charge.In other words,with the increase of charge,the phase transition point of the cooling-heating phase transition gradually decreases.With the increase of the parameter a value,the phase transition point decreases gradually.
作者
李慧玲
缴奚檬
傅子瑜
齐德江
LI Huiling;JIAO Ximeng;FU Ziyu;QI Dejiang(College of Physics Science and Technology,Shenyang Normal University,Shenyang 110034,China;Experimental Teaching Center,Shenyang Normal University,Shenyang 110034,China;School of Electric Power,Shenyang Institute of Technology,Shenyang 110034,China)
出处
《沈阳师范大学学报(自然科学版)》
2025年第2期177-181,共5页
Journal of Shenyang Normal University:Natural Science Edition
基金
辽宁省教育厅科学研究经费项目(LJMZ20221710)。
关键词
冷却-加热相变
反转曲线
反转温度
cooling-heating phase transition
inversion curve
inversion temperature
