Entanglement detection in the vicinity of arbitrary Dicke states

Details Entanglement detection in the vicinity of arbitrary Dicke states Entanglement detection in the vicinity of arbitrary Dicke states

2011-07-26

arxiv.org/abs/1107.5162v1

Physics

Quantum Physics

4 pages

Scientific paper

Dicke states represent a class of multipartite entangled states that can be generated experimentally with many applications in quantum information. We propose a method to experimentally detect genuine multipartite entanglement in the vicinity of arbitrary Dicke states. The detection scheme can be used to experimentally quantity the entanglement depth of many-body systems and is easy to implement as it requires to measure only three collective spin operators. The detection criterion is strong as it heralds multipartite entanglement even in cases where the state fidelity goes down exponentially with the number of qubits.

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