Operational Entanglement Families of Symmetric Mixed N-Qubit States

Details Operational Entanglement Families of Symmetric Mixed N-Qubit States Operational Entanglement Families of Symmetric Mixed N-Qubit States

2010-11-04

arxiv.org/abs/1011.1243v2

Physics

Quantum Physics

4 pages, corrected typos

Scientific paper

We introduce an operational entanglement classification of symmetric mixed states for an arbitrary number of qubits under stochastic local operations and classical communication (SLOCC). We define families of entanglement classes successively embedded into each other, prove that they are of non-zero measure, and construct witness operators to distinguish them. Moreover, we discuss how arbitrary symmetric mixed states can be realized in the lab via a one-to-one correspondence between well-defined sets of controllable parameters and the corresponding entanglement families.

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