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arXiv math/0006169math.OAmath-phmath.DSmath.MP
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部分动力系统与KMS条件

Partial Dynamical Systems and the KMS Condition

Ruy Exel, Marcelo Laca

摘要:

给定一个可数无限的0-1矩阵A,设O_A是作者最近引入的Cuntz-Krieger代数,T_A是O_A的Toeplitz扩张,只要后者被看作是Cuntz-Pimsner代数,如Szymanski最近证明的.研究了基于O_A和T_A的C*-动力系统的KMS平衡态,其中动力学满足σ_t(s_x)= N_x^{it} s_x,其中s_x是正则生成的部分等距,N_x是任意的实数,且N_x > 1.根据反温度β相对于三个临界值的位置(定义为与A和N(x)有关的某个狄利克雷级数收敛的横坐标),对反温度β的一定值,完全刻画了O_A和T_A上的KMS_β态.由于O_A是T_A的协变商,我们的结果是由T_A的结果导出的。当矩阵A是有限的时,作为特例,这些结果给出了Olesen和Pedersen关于O_n的定理和Enomoto,Fujii和Watatani关于O_A的定理.

英文摘要:

Given a countably infinite 0-1 matrix A without identically zero rows, let O_A be the Cuntz-Krieger algebra recently introduced by the authors and T_A be the Toeplitz extension of O_A, once the latter is seen as a Cuntz-Pimsner algebra, as recently shown by Szymanski. We study the KMS equilibrium states of C*-dynamical systems based on O_A and T_A, with dynamics satisfying σ_t(s_x) = N_x^{it} s_x for the canonical generating partial isometries s_x and arbitrary real numbers N_x > 1. The KMS_βstates on both O_A and T_A are completely characterized for certain values of the inverse temperature β, according to the position of βrelative to three critical values, defined to be the abscissa of convergence of certain Dirichlet series associated to A and the N(x). Our results for O_A are derived from those for T_A by virtue of the former being a covariant quotient of the latter. When the matrix A is finite, these results give theorems of Olesen and Pedersen for O_n and of Enomoto, Fujii and Watatani for O_A as particular cases.

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