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A new class of states of reversible entanglement manipulation under positive partial transpose operations |
| Jing Duan(段静)1, Yu Luo(罗宇)2, Yong-Ming Li(李永明)1,2 |
1 College of Mathematics and Information Science, Shaanxi Normal University, Xi'an 710119, China;
2 College of Computer Science, Shaanxi Normal University, Xi'an 710119, China |
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Abstract We first study the reversibility for a class of states under the operations which completely preserve the positivity of partial transpose (PPT) and show that the entanglement cost is equal to the distillable entanglement for a rank-two mixed state on the 4⊗4 antisymmetric subspace under PPT operations. By using a similar method in finding the irreversibility, we also find that the value of a new efficiently computable additive lower bound Eη(ρ) for the asymptotic PPT-relative entropy of entanglement presented in[Phys. Rev. Lett. 119, 180506 (2017)] is equal to the regularized Rains' bound and an upper bound EN(ρ) for distillable entanglement for these states. Furthermore, we find states on the symmetric subspace satisfying the relation mentioned above, generalize the antisymmetric states and symmetric states in higher dimensions, and give a specific value for distillable entanglement and entanglement cost for these states under the PPT operations.
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Received: 30 May 2018
Revised: 05 September 2018
Accepted manuscript online:
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PACS:
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03.67.-a
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(Quantum information)
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03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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03.67.Bg
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(Entanglement production and manipulation)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11671244). |
Corresponding Authors:
Yong-Ming Li
E-mail: liyongm@snnu.edu.cn
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Cite this article:
Jing Duan(段静), Yu Luo(罗宇), Yong-Ming Li(李永明) A new class of states of reversible entanglement manipulation under positive partial transpose operations 2018 Chin. Phys. B 27 110305
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