Distillation of local purity from quantum states

Details Distillation of local purity from quantum states Distillation of local purity from quantum states

2004-06-30

arxiv.org/abs/quant-ph/0406234v1

Physics

Quantum Physics

8 pages

Scientific paper

10.1103/PhysRevA.71.062303

Recently Horodecki et al. [Phys. Rev. Lett. 90, 100402 (2003)] introduced an important quantum information processing paradigm, in which two parties sharing many copies of the same bipartite quantum state distill local pure states, by means of local unitary operations assisted by a one-way (two-way) completely dephasing channel. Local pure states are a valuable resource from a thermodynamical point of view, since they allow thermal energy to be converted into work by local quantum heat engines. We give a simple information-theoretical characterization of the one-way distillable local purity, which turns out to be closely related to a previously known operational measure of classical correlations, the one-way distillable common randomness.

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