Phys. Rev. A 76, 024101 (2007) [4 pages]Multipartite positive-partial-transpose inequalities exponentially stronger than local reality inequalitiesReceived 16 June 2007; published 7 August 2007 We show that positivity of every partial transpose of N-partite quantum states implies inequalities on Bell correlations which are stronger than standard Bell inequalities by a factor of 2(N−1)∕2. A violation of the inequality implies that the system is in a bipartite distillable entangled state. It turns out that a family of N-qubit bound entangled states proposed by Dür Phys. Rev. Lett. 87 230402 (2001) violates the inequality for N⩾4. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.76.024101
DOI:
10.1103/PhysRevA.76.024101
PACS:
03.65.Ud, 03.67.Mn
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.