Selfcomplementary Quantum Channels

Marek Smaczyński, Wojciech Roga, Karol Życzkowski
2016 Open systems & information dynamics  
Selfcomplementary quantum channels are characterized by such an interaction between the principal quantum system and the environment that leads to the same output states of both interacting systems. These maps can describe approximate quantum copy machines, as perfect copying of an unknown quantum state is not possible due to the celebrated no-cloning theorem. We provide here a parametrization of a large class of selfcomplementary channels and analyze their properties. Selfcomplementary
more » ... preserve some residual coherences and residual entanglement. Investigating some measures of non-Markovianity we show that time evolution under selfcomplementary channels is highly non-Markovian.
doi:10.1142/s1230161216500141 fatcat:jg7thbifhvgjhd4ksd4uzlxykm