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- Title
Tighter generalized monogamy and polygamy relations for multiqubit systems.
- Authors
Jin, Zhi-Xiang; Fei, Shao-Ming
- Abstract
We present a different kind of monogamy and polygamy relations based on concurrence and concurrence of assistance for multiqubit systems. By relabeling the subsystems associated with different weights, a smaller upper bound of the α th ( 0 ≤ α ≤ 2 ) power of concurrence for multiqubit states is obtained. We also present tighter monogamy relations satisfied by the α th ( 0 ≤ α ≤ 2 ) power of concurrence for N-qubit pure states under the partition AB and C 1 ⋯ C N - 2 , as well as under the partition A B C 1 and C 2 ⋯ C N - 2 . These inequalities give rise to the restrictions on entanglement distribution and the trade-off of entanglement among the subsystems. Similar results are also derived for negativity.
- Subjects
QUANTUM information science; TERRITORIAL partition; QUBITS
- Publication
Quantum Information Processing, 2020, Vol 19, Issue 1, p1
- ISSN
1570-0755
- Publication type
Article
- DOI
10.1007/s11128-019-2522-0