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