All Nonclassical Correlations Can Be Activated into Distillable Entanglement
Abstract
We devise a protocol in which general nonclassical multipartite correlations produce a physically relevant effect, leading to the creation of bipartite entanglement. In particular, we show that the relative entropy of quantumness, which measures all nonclassical correlations among subsystems of a quantum system, is equivalent to and can be operationally interpreted as the minimum distillable entanglement generated between the system and local ancillae in our protocol. We emphasize the key role of state mixedness in maximizing nonclassicality: Mixed entangled states can be arbitrarily more nonclassical than separable and pure entangled states.
 Publication:

Physical Review Letters
 Pub Date:
 June 2011
 DOI:
 10.1103/PhysRevLett.106.220403
 arXiv:
 arXiv:1103.4032
 Bibcode:
 2011PhRvL.106v0403P
 Keywords:

 03.65.Ud;
 03.65.Ta;
 03.67.Ac;
 03.67.Mn;
 Entanglement and quantum nonlocality;
 Foundations of quantum mechanics;
 measurement theory;
 Quantum algorithms protocols and simulations;
 Entanglement production characterization and manipulation;
 Quantum Physics;
 Condensed Matter  Statistical Mechanics;
 Mathematical Physics
 EPrint:
 4+4 pages, 1 figure. Published version