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http://dx.doi.org/10.4134/BKMS.2002.39.3.471

STATE EXTENSIONS OF STATES ON UHFn ALGEBRA TO CUNTZ ALGEBRA  

Shin, Dong-Yun (Department of Mathematics, University of Seoul)
Publication Information
Bulletin of the Korean Mathematical Society / v.39, no.3, 2002 , pp. 471-478 More about this Journal
Abstract
Let $Let\eta={\eta m}m$ be an eventually constant sequence of unit vectors $\eta m$ in $C^{n}$ and let $\rho$η be the pure state on $UHF_{n}$ algebra which is defined by $\rho\eta(\upsilon_i_1....\upsilon_i_k{\upsilon_{j1}}^*...{\upsilon_{j1}}^*)={\eta_1}^{i1}...{\eta_k}^{ik}{\eta_k}^{jk}...{\eta_1}^{j1}$. We find infinitely many state extensions of $\rho\eta$ to Cuntz algebra $O_n$ using representations and unitary operators. Also, we present theirconcrete expressions.
Keywords
Cuntz algebra; $UHF_n$ algebra; state; extension;
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