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首页> 外文期刊>Romanian journal of physics >THE THERMODYNAMIC EQUIVALENCE AT WORK: TRANSFORMING FERMI SYSTEMS INTO BOSE SYSTEMS
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THE THERMODYNAMIC EQUIVALENCE AT WORK: TRANSFORMING FERMI SYSTEMS INTO BOSE SYSTEMS

机译:工作中的热力学对等:将费米系统转变为玻色系统

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摘要

We generalize the method introduced in J. Phys. A: Math. Gen. 35, 7255 (2002) based on the concept of thermodynamic equivalence and we transform a Fermi system of general density of states into a thermodynamically equivalent Bose system. This consists of mapping configurations of fermions from the original system onto configurations of bosons, the initial and final configurations having the same energy above the many-body ground state energy. In this way we obtain two systems of particles of different exclusion statistics, but which have the same entropies-and therefore identical canonical thermodynamic properties. This method enables one in general to calculate the system properties in either of the bosonic and fermionic representations. We check the method here in microscopic detail by calculating the equilibrium particle distributions in the two representations using the entropy maximization at fixed particle number and fixed "fermionic" and "bosonic" energies, respectively. Analytical calculations seem difficult to do, but we check the results numerically and we find them equal within the numerical accuracy.
机译:我们归纳了J. Phys。中引入的方法。答:数学。 Gen. 35,7255(2002)基于热力学当量的概念,我们将一般状态密度的费米系统转化为热力学当量的Bose系统。这包括将来自原始系统的费米子构型映射到玻色子的构型,初始构型和最终构型在多体基态能量之上具有相同的能量。通过这种方式,我们获得了两个具有不同排斥统计的粒子系统,但是它们具有相同的熵,因此具有相同的规范热力学性质。这种方法通常使人们能够以玻色和铁离子表示形式来计算系统特性。我们在微观上详细检查了该方法,方法是分别使用固定粒子数和固定“铁离子”和“玻色子”能量的熵最大化来计算两种表示形式中的平衡粒子分布。进行分析计算似乎很困难,但是我们通过数字检查结果,发现它们在数值精度范围内是相等的。

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