由边界权加倍诱导的II_0型E_0-半群
On type II_0 E_0-semigroups induced by boundary weight doubles
摘要:
Powers证明了对于可分的希尔伯特空间K,每个空间E_0-半群都可以由作用在B(K \otimes L ^2(0,\infty))上的CP-流的边界权映射得到.本文通过边界权双(n,v)定义了边界权映射,其中n:M_n(\C)\to M_n(\C)是q-正映射,v是L^2(0,\infty)上的边界权.这类对偶诱导了K上的CP-流,其中1<dim(K)< \infty,然后利用Bhat定理极小扩张到E_0-半群.通过这种构造,我们得到了对于每个n>1,n \in \mathbb{N},不可数多个互非上循环共轭E_0-半群.
英文摘要:
Powers has shown that each spatial E_0-semigroup can be obtained from the boundary weight map of a CP-flow acting on B(K \otimes L^2(0, \infty)) for some separable Hilbert space K. In this paper, we define boundary weight maps through boundary weight doubles (ϕ, ν), where ϕ: M_n(\C) \to M_n(\C) is a q-positive map and νis a boundary weight over L^2(0, \infty). These doubles induce CP-flows over K for 1<dim(K)<\infty which then minimally dilate to E_0-semigroups by a theorem of Bhat. Through this construction, we obtain uncountably many mutually non-cocycle conjugate E_0-semigroups for each n>1, n \in \mathbb{N}.
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