Optimization approach to entanglement distillation

Details Optimization approach to entanglement distillation Optimization approach to entanglement distillation

1998-11-30

arxiv.org/abs/quant-ph/9811090v2

Phys.Rev. A60 (1999) 167-172

Physics

Quantum Physics

6 pages, 5 figures, REVTEX. New examples, figures and references, more detailed explanations. To appear in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.60.167

We put forward a method for optimized distillation of partly entangled pairs of qubits into a smaller number of more entangled pairs by recurrent local unitary operations and projections. Optimized distillation is achieved by minimization of a cost function with up to 30 real parameters, which is chosen to be sensitive to the fidelity and the projection probability at each step. We show that in many cases this approach can significantly improve the distillation efficiency in comparison to the present methods.

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