caa a22 4500 445867051 CHVBK 20180317145501.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1140/epjd/e2011-20543-y doi (NATIONALLICENCE)springer-10.1140/epjd/e2011-20543-y Quantum dissension: Generalizing quantum discord for three-qubit states [Elektronische Daten] [I. Chakrabarty, P. Agrawal, A. Pati] We introduce the notion of quantum dissension for a three-qubit system as a measure of quantum correlations. We use three classically equivalent expressions of three-variable mutual information. Their differences are zero classically but not so in quantum domain. It generalizes the notion of quantum discord to a multipartite system. There can be multiple definitions of the dissension depending on the nature of projective measurements done on the subsystems. As an illustration, we explore the consequences of these multiple definitions and compare them for three-qubit pure and mixed GHZ and W states. We find that unlike discord, dissension can be negative. This is because measurement on a subsystem may enhance the correlations in the rest of the system. Furthermore, when we consider a bipartite split of the system, the dissension reduces to discord. This approach can pave a way to generalize the notion of quantum correlations in the multiparticle setting. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2011 Chakrabarty I. Institute of Physics, Sainik School Post, 751005, Bhubaneswar, Orissa, India aut Agrawal P. Institute of Physics, Sainik School Post, 751005, Bhubaneswar, Orissa, India aut Pati A. Harish Chandra Research Institute, Chhatnag Road, Jhunsi, 211019, Allahabad, UP, India aut The European Physical Journal D Springer-Verlag 65/3(2011-12-01), 605-612 1434-6060 65:3<605 2011 65 10053 https://doi.org/10.1140/epjd/e2011-20543-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2011-20543-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chakrabarty I. Institute of Physics, Sainik School Post, 751005, Bhubaneswar, Orissa, India aut NATIONALLICENCE 700 1- Agrawal P. Institute of Physics, Sainik School Post, 751005, Bhubaneswar, Orissa, India aut NATIONALLICENCE 700 1- Pati A. Harish Chandra Research Institute, Chhatnag Road, Jhunsi, 211019, Allahabad, UP, India aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 65/3(2011-12-01), 605-612 1434-6060 65:3<605 2011 65 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer