# Evolution of pairwise entanglement in a coupled n-body system (6 pages)

@article{Pineda2005EvolutionOP, title={Evolution of pairwise entanglement in a coupled n-body system (6 pages)}, author={Carlos Pineda and Thomas H. Seligman}, journal={Physical Review A}, year={2005}, volume={73}, pages={12305} }

We study the exact evolution of two noninteracting qubits, initially in a Bell state, in the presence of an environment, modeled by a kicked Ising spin chain. Dynamics of this model range from integrable to chaotic and we can handle numerics for a large number of qubits. We find that the entanglement (as measured by concurrence) of the two qubits has a close relation to the purity of the pair, and closely follows an analytic relation derived for Werner states. As a collateral result we find…

## 19 Citations

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