Communications of the
Korean Mathematical Society
CKMS

ISSN(Print) 1225-1763 ISSN(Online) 2234-3024

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Commun. Korean Math. Soc. 2009; 24(1): 99-109

Printed March 1, 2009

Copyright © The Korean Mathematical Society.

A remark on ergodicity of quantum Markovian semigroups

Chul Ki Ko

Yonsei University

Abstract

The aim of this paper is to find the set of the fixed elements and the set of elements for which equality holds in Schwarz inequality for the KMS-symmetric Markovian semigroup $\{S_t\}_{t\ge0}$ given in \cite{Pa1}. As an application, we study some properties such as the ergodicity and the asymptotic behavior of the semigroup.

Keywords: quantum Markovian semigroups, ergodicity

MSC numbers: 46L55, 37A60

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