An important property of entanglement: pairwise entanglement that can only be transferred by an entangled pair

• 来源期刊: 中国物理（英文版）
• 关键词: pairwise entanglement transfer of entanglement Heisenberg ⅩⅩ chain
• 年，卷（期）: 2007,（7）
• 页码范围: 1858-1862
• 页数: 5页
• 语种: 英文

摘要

Based on the calculation of all the pairwise entanglements in the n(n≤6)-qubit Heisenberg ⅩⅩ open chain with system impurity, we find an important result: pairwise entanglement can only be transferred by an entangled pair. The non-nearest pairwise entanglements will have the possibility to exist as long as there has been even number of qubits in their middle. This point indicates that we can obtain longer distance entanglement in a solid system.