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One Parameter Family of N-Qudit Werner-Popescu States: Bipartite Separability Using Conditional Quantum Relative Tsallis Entropy
Department of Physics, Kuvempu University, Shankaraghatta, Shimoga, India
Inspire Institute Inc., Alexandria, USA
Department of Physics, Bangalore University, Bangalore, India
Harish-Chandra Research Institute, Allahabad, India
Institute of Mathematical Sciences, C.I.T. Campus, Chennai, India
- 1 Department of Physics, Kuvempu University, Shankaraghatta, Shimoga, India
- 2 Inspire Institute Inc., Alexandria, USA
- 3 Department of Physics, Bangalore University, Bangalore, India
- 4 Harish-Chandra Research Institute, Allahabad, India
- 5 Institute of Mathematical Sciences, C.I.T. Campus, Chennai, India
Journal of Quantum Information Science·Volume 08 (2018)·Pages 12–23·Published 6 March 2018·DOI10.4236/jqis.2018.81002
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Abstract
The conditional version of sandwiched Tsallis relative entropy (CSTRE) is employed to study the bipartite separability of one parameter family of N -qudit Werner-Popescu states in their 1:N-1 partition. For all N , the strongest limitation on bipartite separability is realized in the limit and is found to match exactly with the separability range obtained using an algebraic method which is both necessary and sufficient. The theoretical superiority of using CSTRE criterion to find the bipartite separability range over the one using Abe-Rajagopal (AR) q -conditional entropy is illustrated by comparing the convergence of the parameter x with respect to q , in the implicit plots of AR q -conditional entropy and CSTRE.
KeywordsEntropic Separability Criterion<i>q</i>-Conditional EntropiesNon-Commuting Version of Relative Entropy
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