Entangled graphs
| Authors | |
|---|---|
| Year of publication | 2002 |
| Type | Article in Periodical |
| Magazine / Source | Quantum Information and Computing |
| MU Faculty or unit | |
| Citation | |
| Field | Theoretical physics |
| Keywords | quantum entanglement; multi-partite systems |
| Description | We study how bi-partite quantum entanglement (measured in terms of a concurrence) can be shared in multi-qubit systems. We introduce a concept of the {\em entangled graph} such that each qubit of a multi-partite system is associated with a vertex while a bi-partite entanglement between two specific qubits is represented by an edge. We prove that any entangled graph can be associated with a {\em pure} state of a multi-qubit system. We also derive bounds on the concurrence for some weighted entangled graphs (the weight corresponds to the value of concurrence associated with the given edge). |
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