We consider two particles of spin-[InlineEquation not available: see fulltext.] interacting with two one-dimensional N-spin arrays, respectively, which is an exactly solvable model. In this model, the one-dimensional N-spin arrays can be regarded as a macroscopic medium if we consider the number N of spins being large enough. In this paper, we investigate the dynamics of entanglement and quantum discord of the spins of two particles in the case of two particles passing through the macroscopic mediums synchronously and out-sync. In both case, we can obtain that the entanglement decreases monotonically with time and may suffer a sudden death in the evolution. Different from the entanglement dynamics, quantum discord first remains unchanged during a period of time and decreases later, which can be described as the sudden transition between classical and quantum decoherence. We also observe that the entanglement and quantum discord decay to zero in the case of enough large N, which can be understood that the interaction with the macroscopic medium can destroy the quantum correlation of a two-qubit system.
Quantum Information Processing – Springer Journals
Published: Mar 29, 2016
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
All the latest content is available, no embargo periods.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud