Separability and distillability of multiparticle quantum systems

Abstract

We present a family of 3--qubit states to which any arbitrary state can be depolarized. We fully classify those states with respect to their separability and distillability properties. This provides a sufficient condition for nonseparability and distillability for arbitrary states. We generalize our results to $N$--particle states.

replaced with published version (Phys.Rev.Lett.), in parts rewritten and clarified

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