Spin Squeezing and Entanglement of Many-Particle Spin-Half States

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2005,（2）
• 页码范围: 271-274
• 页数: 4页
• 语种: 英文

摘要

In many-particle spin-half systems with exchange symmetry, we find that the spin squeezing is related to two types of entanglement, the bipartite and the pairwise entanglement. A quantitative relationship is revealed for the spin squeezing parameter, the tangle, and the concurrence. We find that a class of states is spin squeezed if the pairwise entanglement is stronger than the bipartite entanglement.