Production of entanglement with highly-mixed states
arXiv:1204.2077 · doi:10.1103/PhysRevA.85.044301
Abstract
We study production of entanglement with highly-mixed states. We find that entanglement between highly mixed states can be generated via a direct unitary interaction even when both states have purities arbitrarily close to zero. This indicates that purity of a subsystem is not required for entanglement generation. Our result is in contrast to previous studies where the importance of the subsystem purity was emphasized.
arXiv comment4 pages, 5 figures
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