Abstract
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 channels 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.
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 channels 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.
| Original language | English |
|---|---|
| Pages (from-to) | 1-26 |
| Number of pages | 27 |
| Journal | Open Systems & Information Dynamics |
| Volume | 23 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 31 Oct 2016 |
Keywords
- principal quantum system
- quantum channel
- complementary channel
- non-Markovian
- stochastic map