Effects of Collisional Decoherence on Multipartite Entanglement - How would entanglement not be relatively common?

Details Effects of Collisional Decoherence on Multipartite Entanglement - How would entanglement not be relatively common? Effects of Collisional Decoherence on Multipartite Entanglement - How would entanglement not be relatively common?

2006-02-21

arxiv.org/abs/quant-ph/0602169v1

Physics

Quantum Physics

10 pages

Scientific paper

We consider the collision model of Ziman {\em et al.} and study the robustness of $N$-qubit Greenberger-Horne-Zeilinger (GHZ), W, and linear cluster states. Our results show that $N$-qubit entanglement of GHZ states would be extremely fragile under collisional decoherence, and that of W states could be more robust than of linear cluster states. We indicate that the collision model of Ziman {\em et al.} could provide a physical mechanism to some known results in this area of investigations. More importantly, we show that it could give a clue as to how $N$-partite distillable entanglement would be relatively rare in our macroscopic classical world.

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