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CAR flows on type III factors and their extendability

机译:CAR在III型因素上的流动及其可扩展性

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In this paper we prove that the CAR flows on type III factors arising from a large class of quasi-free states are not extendable, in the sense of Bikram, Izumi, Srinivasan and Sunder.(8) As a consequence, CAR flows and CCR flows on type III factors are not cocycle conjugate. This is in sharp contrast with the situation for the type I-infinity factor, for which CAR and CCR flows are in fact conjugate. In addition, we also compute the super-product systems associated to CAR flows.
机译:在本文中,我们证明了从Bikram,Izumi,Srinivasan和Sunder的意义上说,源自一类大类准自由状态的III型因子的CAR流量是不可扩展的。(8)结果,CAR流量和CCR III型因子的流量不是cocycle缀合物。这与I型无穷大因子的情况形成了鲜明的对比,对于I型无穷大因子,CAR和CCR流量实际上是共轭的。此外,我们还计算与CAR流相关的超级产品系统。

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