arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0906.2908cond-mat.stat-mech
收藏

非广延统计力学中q-平均值的反常行为

Anomalous behavior of q-averages in nonextensive statistical mechanics

Sumiyoshi Abe

摘要:

平均的广义定义,称为q-平均,广泛应用于非广延统计力学领域。然而,最近有人指出,这样的平均值在概率分布的特定变形下可能表现为非物理的。在此,讨论并澄清以下三个问题。首先,所考虑的变形是物理的,并且可以通过实验来实现。其次,从热统计学的观点来看,q-平均在有限和无限离散系统中都是不稳定的。第三,将讨论简单地推广到连续系统会忽略一点,应该使用比$L^1$ -范数更好的范数来测量两个概率分布之间的距离。因此,稳定性的q-平均值被证明是不成立的,在所有的情况下。

英文摘要:

A generalized definition of average, termed the q-average, is widely employed in the field of nonextensive statistical mechanics. Recently, it has however been pointed out that such an average value may behave unphysical under specific deformations of probability distributions. Here, the following three issues are discussed and clarified. Firstly, the deformations considered are physical and may experimentally be realized. Secondly, in view of thermostatistics, the q-average is unstable in both finite and infinite discrete systems. Thirdly, a naive generalization of the discussion to continuous systems misses a point, and a norm better than the $L^1$-norm should be employed for measuring the distance between two probability distributions. Consequently, stability of the q-average is shown not to be established in all the cases.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑