Correlations in Two-Qubit Systems under Non-Dissipative Decoherence

BUSSANDRI, DIEGO G.; OSÁN, TRISTÁN M.; LAMBERTI, PEDRO W.; MAJTEY, ANA P.

Axioms

Multidisciplinary Digital Publishing Institute

Año: 2020 vol. 9

div class="target-item custom-accordion-for-small-screen-content ">We built a new set of suitable measures of correlations for bipartite quantum states based upon a recently introduced theoretical framework [Bussandri et al. in Quantum Inf. Proc. 18:57, 2019]. We applied these measures to examine the behavior of correlations in two-qubit states with maximally mixed marginals independently interacting with non-dissipative decohering environments in different dynamical scenarios of physical relevance. In order to get further insight about the physical meaning of the behavior of these correlation measures we compared our results with those obtained by means of well-known correlation measures such as quantum mutual information and quantum discord. On one hand, we found that the behaviors of total and classical correlations, as assessed by means of the measures introduced in this work, are qualitatively in agreem