David P. DiVincenzo, Peter W. Shor, et al.
Physical Review A - AMO
We introduce a measure of both quantum as well as classical correlations in a quantum state, the entanglement of purification. We show that the (regularized) entanglement of purification is equal to the entanglement cost of creating a state ρ asymptotically from maximally entangled states, with negligible communication. We prove that the classical mutual information and the quantum mutual information divided by two are lower bounds for the regularized entanglement of purification. We present numerical results of the entanglement of purification for Werner states in H2 ⊗ H2. © 2002 American Institute of Physics.
David P. DiVincenzo, Peter W. Shor, et al.
Physical Review A - AMO
Barbara M. Terhal, David P. DiVincenzo
Physical Review A - AMO
Stephanie Wehner, Christian Schaffner, et al.
Physical Review Letters
Barbara M. Terhal
Physics Letters, Section A: General, Atomic and Solid State Physics