Multiple Entropy Measures for Multi-particle Pure Quantum State  

作　　者：刘丹 赵鑫 龙桂鲁 

机构地区：[1]School of Science,Dalian Nationalities University [2]Key Laboratory for Atomic and Molecular NanoSciences and Department of Physics,Tsinghua University [3]Tsinghua National Laboratory for Information Science and Technology,Tsinghua University

出　　处：《Communications in Theoretical Physics》2010年第11期825-828,共4页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos.10775076,10874098 (GLL);the 973 Program 2006CB921106 (XZ); the SRFDP Program of Education Ministry of China under Gtant No.20060003048; the Fundamental Research Funds for the Central Universities,DC10040119 (DL)

摘　　要：We propose to use a set of averaged entropies, the multiple entropy measures (MEMS), to partiallyquantify quantum entanglement of multipartite quantum state.The MEMS is vector-like with m = [N/2] components:[S_1, S_2,..., S_m], and the i-th component S_i is the geometric mean of i-qubits partial entropy of the system.The S_imeasures how strong an arbitrary i qubits from the system are correlated with the rest of the system.It satisfies theconditions for a good entanglement measure.We have analyzed the entanglement properties of the GHZ-state, theW-states, and cluster-states under MEMS.

关 键 词：MEMS entanglement measure multiple entropy measures 

分 类 号：O431.2[机械工程—光学工程]