Entanglement cost and distillable entanglement of symmetric states

Details Entanglement cost and distillable entanglement of symmetric states Entanglement cost and distillable entanglement of symmetric states

2007-08-23

arxiv.org/abs/0708.3129v1

Physics

Quantum Physics

Scientific paper

We compute entanglement cost and distillable entanglement of states supported on symmetric subspace. Not only giving general formula, we apply them to the output states of optimal cloning machines. Surprisingly, under some settings, the optimal n to m clone and true m copies are the same in entanglement measures. However, they differ in the error exponent of entanglement dilution. We also presented a general theory of entanglement dilution which is applicable to any non-i.i.d sequence of states.

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