Portal de Periódicos da CAPES

Optimization approach to entanglement distillation

1999; American Physical Society; Volume: 60; Issue: 1 Linguagem: Inglês

10.1103/physreva.60.167

1538-4446

Tomáš Opatrný, Gershon Kurizki,

Quantum Mechanics and Applications

We put forward a method for optimized distillation of partly entangled pairs of quantum bits 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.