Production of entanglement with highly-mixed states

Details Production of entanglement with highly-mixed states Production of entanglement with highly-mixed states

2012-04-10

arxiv.org/abs/1204.2077v1

Phys. Rev. A 85, 044301 (2012)

Physics

Quantum Physics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevA.85.044301

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.

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