Spin Squeezing and Entanglement of Many-Particle Spin-Half States
YAN Dong1, WANG Xiao-Guang2, WU Ling-An3
1Institute of Applied Physics, Changchun University, Changchun 130022
2Zhejiang Institute of Modern Physics, Department of Physics, Zhejiang University, HangZhou 310027
3Lab of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
Spin Squeezing and Entanglement of Many-Particle Spin-Half States
YAN Dong1;WANG Xiao-Guang2;WU Ling-An3
1Institute of Applied Physics, Changchun University, Changchun 130022
2Zhejiang Institute of Modern Physics, Department of Physics, Zhejiang University, HangZhou 310027
3Lab of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
Abstract： 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.
YAN Dong;WANG Xiao-Guang;WU Ling-An. Spin Squeezing and Entanglement of Many-Particle Spin-Half States[J]. 中国物理快报, 2005, 22(2): 271-274.
YAN Dong, WANG Xiao-Guang, WU Ling-An. Spin Squeezing and Entanglement of Many-Particle Spin-Half States. Chin. Phys. Lett., 2005, 22(2): 271-274.
2005, Vol. 22 
