Characterizing multipartite symmetric Dicke states under the effects of noise

Details Characterizing multipartite symmetric Dicke states under the effects of noise Characterizing multipartite symmetric Dicke states under the effects of noise

2009-03-23

arxiv.org/abs/0903.3939v2

New J. Phys. 11 073039 (2009)

Physics

Quantum Physics

11 pages, 9 figures, RevTeX4 Revised version. Accepted for publication in New Journal of Physics

Scientific paper

We study genuine multipartite entanglement (GME) in a system of $n$ qubits prepared in symmetric Dicke states and subjected to the influences of noise. We provide general, setup-independent expressions for experimentally favorable tools such as fidelity- and collective spin-based entanglement witnesses, as well as entangled-class discriminators and multi-point correlation functions. Besides highlighting the effects of the environment on large qubit registers, we also discuss strategies for the robust detection of GME. Our work provides techniques and results for the experimental communities interested in investigating and characterizing multipartite entangled states by introducing realistic milestones for setup design and associated predictions.

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