Physical accessibility of non-completely positive maps Export

@misc{citeulike:833628, abstract = {We study classes of generalized dynamical maps which are not completely positive. We show that some of these maps correspond to actual, physical systems described in the environmental representation by a unitary dynamics of an extended system and the partial trace. The non complete positivity is due to certain prior correlations of the principal system with the environment. These correlation may have classical nature and no entanglement is necessary to generate a non CP dynamics. We discuss its applications to the dynamical decoupling and quantum channels.}, archivePrefix = {arXiv}, author = {Carteret, Hilary and Terno, Daniel R. and Zyczkowski, Karol}, citeulike-article-id = {833628}, citeulike-linkout-0 = {http://arxiv.org/abs/quant-ph/0512167}, citeulike-linkout-1 = {http://arxiv.org/pdf/quant-ph/0512167}, day = {20}, eprint = {quant-ph/0512167}, keywords = {access, accessibility, wsif}, month = {Dec}, posted-at = {2006-09-07 15:11:32}, priority = {2}, title = {Physical accessibility of non-completely positive maps}, url = {http://arxiv.org/abs/quant-ph/0512167}, year = {2005} }

TY - ELEC ID - citeulike:833628 L3 - citeulike-article-id:833628 N2 - We study classes of generalized dynamical maps which are not completely positive. We show that some of these maps correspond to actual, physical systems described in the environmental representation by a unitary dynamics of an extended system and the partial trace. The non complete positivity is due to certain prior correlations of the principal system with the environment. These correlation may have classical nature and no entanglement is necessary to generate a non CP dynamics. We discuss its applications to the dynamical decoupling and quantum channels. TI - Physical accessibility of non-completely positive maps KW - access KW - accessibility KW - wsif AU - Carteret, Hilary AU - Terno, Daniel AU - Zyczkowski, Karol PY - 2005/Dec/20/ UR - http://arxiv.org/abs/quant-ph/0512167 ER -