Year: 2011
Type: article
Abstract: For the case of phase damping (pure decoherence) we investigate the extent to which environmental traits are imprinted on an open quantum system. The dynamics is described using the quantum channel approach. We study what the knowledge of the channel may reveal about the nature of its underlying dynamics and, conversely, what the dynamics tell us about how to consistently model the environment. We find that, for a Markov phase-damping channel(i.e., a channel compatible with a time-continuous Markovian evolution), the environment may adequately be represented by a mixture of only a few coherent states. For arbitrary Hilbert space dimension $N\ensuremath{\geqslant}4$ we refine the idea of quantum phase damping, for which we show a means of identification. Symmetry considerations are used to identify decoherence-free subspaces of the system.
Source: Physical Review A
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2025145693