Publication details
Entangled webs: Tight bound for symmetric sharing of entanglement
| Authors | |
|---|---|
| Year of publication | 2000 |
| Type | Article in Periodical |
| Magazine / Source | Physical Review A |
| MU Faculty or unit | |
| Citation | |
| Field | Theoretical physics |
| Keywords | STATE ENTANGLEMENT; BELL THEOREM; QUANTUM; CRYPTOGRAPHY |
| Description | 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 >. |
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