中国物理B ›› 2009, Vol. 18 ›› Issue (7): 2719-2723.doi: 10.1088/1674-1056/18/7/015
成传明1, 侯喜文2
Hou Xi-Wen(侯喜文)a) and Cheng Chuan-Ming(成传明)b)
摘要: The dynamical entanglement for Fermi coupled C--H stretch and bend vibrations in molecule CHD3 is studied in terms of two negativities and the reduced von Neumann entropy, where initial states are taken to be direct products of photon-added coherent states on each mode. It is demonstrated that the negativity defined by the sum of negative eigenvalues of the partial transpose of density matrices is positively correlated with the von Neumann entropy. The entanglement difference between photon-added coherent states and usual coherent states is discussed as well.
中图分类号: (Quantum state engineering and measurements)