Comparative analysis of entanglement measures based on monogamy inequality

Geetha, P. J. and Sudha and Mallesh, K. S. (2017) Comparative analysis of entanglement measures based on monogamy inequality. Chinese Physics B, 26 (5). ISSN 1674-1056

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Abstract

We evaluate the monogamy inequality for symmetric, non-symmetric pure states of importance in terms of squared concurrence, squared entanglement of formation, squared negativity of partial transpose and compare the corresponding tangles. We show that though concurrence and concurrence tangle are zero for two special classes of mixed entangled states, both negativity tangle and entanglement of formation (EOF) tangle turn out to be non-zero. A comparison of different tangles is carried out in each case and it is shown that while the concurrence tangle captures the genuine multiqubit entanglement in N-qubit pure states with N distinct spinors (containing GHZ and superposition of W-, obverse W states) either negativity tangle or EOF tangle is to be used as a better measure of entanglement in the W-class of states with two distinct spinors and in the special classes of mixed multiqubit states.

Item Type:	Article
Subjects:	D Physical Science > Physics
Divisions:	Department of > Physics
Depositing User:	C Swapna Library Assistant
Date Deposited:	24 Jun 2019 10:14
Last Modified:	24 Jun 2019 10:14
URI:	http://eprints.uni-mysore.ac.in/id/eprint/3742

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