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Chin. Phys. B, 2019, Vol. 28(12): 120304    DOI: 10.1088/1674-1056/ab4e7d
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Relations between tangle and I concurrence for even n-qubit states

Xin-Wei Zha(查新未), Ning Miao(苗宁), Ke Li(李轲)
Xi'an University of Posts and Telecommunications, Xi'an 710121, China
Abstract  Gilad Gour and Nolan R Wallach[J. Math. Phys. 51 112201 (2010)] have proposed the 4-tangle and the square of the I concurrence. They also gave the relationship between the 4-tangle and the square of the I concurrence. In this paper, we give the expression of the square of the I concurrence and the n-tangle for six-qubit and eight-qubit by some local unitary transformation invariant. We prove that in six-qubit and eight-qubit states there exist strict monogamy laws for quantum correlations. We elucidate the relations between the square of the I concurrence and the n-tangle for six-qubit and eight-qubits. Especially, using this conclusion, we can show that 4-uniform states do not exist for eight-qubit states.
Keywords:  quantum correlations      entangled relations      n-tangle      six-qubit and eight-qubit  
Received:  12 July 2019      Revised:  26 September 2019      Accepted manuscript online: 
PACS:  03.67.Mn (Entanglement measures, witnesses, and other characterizations)  
  03.65.Ud (Entanglement and quantum nonlocality)  
Corresponding Authors:  Ning Miao     E-mail:  673431488@qq.com

Cite this article: 

Xin-Wei Zha(查新未), Ning Miao(苗宁), Ke Li(李轲) Relations between tangle and I concurrence for even n-qubit states 2019 Chin. Phys. B 28 120304

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