دانلود مقاله : Purified discord and multipartite entanglement 2013

چکیده : 

We study bipartite quantum discord as a manifestation of a multipartite

entanglement structure in the tripartite purified system.

In particular, we find that bipartite quantum discord requires the

presence of both bipartite and tripartite entanglement in the purification.

This allows one to understand the asymmetry of quantum

discord, D(A, B) ̸= D(B, A) in terms of entanglement monogamy.

As instructive special cases, we study discord for qubits and Gaussian

states in detail