| KOASHI, M., Vladimír BŮŽEK a N. IMOTO. Entangled webs: Tight bound for symmetric sharing of entanglement. Physical Review A. USA: American Physical Society, 2000, roč. 62, č. 05, s. N/A, N/A. ISSN 1050-2947. |
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@article{349937,
author = {Koashi, M. and Bůžek, Vladimír and Imoto, N.},
article_location = {USA},
article_number = {05},
keywords = {STATE ENTANGLEMENT; BELL THEOREM; QUANTUM; CRYPTOGRAPHY},
language = {eng},
issn = {1050-2947},
journal = {Physical Review A},
title = {Entangled webs: Tight bound for symmetric sharing of entanglement},
volume = {62},
year = {2000}
}
TY - JOUR
ID - 349937
AU - Koashi, M. - Bůžek, Vladimír - Imoto, N.
PY - 2000
TI - Entangled webs: Tight bound for symmetric sharing of entanglement
JF - Physical Review A
VL - 62
IS - 05
SP - N/A
EP - N/A
PB - American Physical Society
SN - 10502947
KW - STATE ENTANGLEMENT
KW - BELL THEOREM
KW - QUANTUM
KW - CRYPTOGRAPHY
N2 - Quantum entanglement cannot be unlimitedly shared among an arbitrary number of qubits. The degree of bipartite entanglement decreases as the number of entangled pairs in an N-qubit system increases. We analyze a system of N qubits in which an arbitrary pair of particles is entangled. We show that the maximum degree of entanglement (measured in the concurrence) between any pair of qubits is 2/N. This tight bound can be achieved when the qubits are prepared in a pure symmetric (with respect to permutations) state with just one qubit in the basis stare \0 > and the others in the basis state \1 >.
ER -
KOASHI, M., Vladimír BŮŽEK a N. IMOTO. Entangled webs: Tight bound for symmetric sharing of entanglement. \textit{Physical Review A}. USA: American Physical Society, 2000, roč.~62, č.~05, s.~N/A, N/A. ISSN~1050-2947.
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