@article {
author = {Abazari, R. and Niknam, A.},
title = {Existence of ground states for approximately inner two--parameter $C_0$--groups on $C^*$--algebras},
journal = {Bulletin of the Iranian Mathematical Society},
volume = {42},
number = {2},
pages = {435-446},
year = {2016},
publisher = {Iranian Mathematical Society (IMS)},
issn = {1017-060X},
eissn = {1735-8515},
doi = {},
abstract = {In this paper, we generalize the definitions of approximately inner $C_0$-groups and their ground states to the two- parameter case and study necessary and sufficient conditions for a state to be ground state. Also we prove that any approximately inner two- parameter $C_0$--group must have at least one ground state. Finally some applications are given.},
keywords = {Two--parameter group,Approximately inner dynamical system,Tensor product,Ground state},
url = {http://bims.iranjournals.ir/article_770.html},
eprint = {http://bims.iranjournals.ir/article_770_d466d7717510eb9caf6af9b237000141.pdf}
}