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arXiv:2412.03591 · International Journal of Theoretical Physics

Quantum Correlations in One Parameter Mixed Quantum States

Kapil K. Sharma, Rishikant Rajdeepak, Fatih Özaydin

Published Apr 5, 2025• 0 citations
arXivHTMLPDF
DOI
10.1007/s10773-025-05974-y

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We investigate the pairwise quantum correlations in standard Gisin states and in Gisin states based on bipartite spin-coherent states by employing quantum negativity and quantum local uncertainty as bona fide quantum correlations measures. Gisin states are defined as mixtures of separable mixed states and some pure entangled ones. We compare the behavior of the two quantifiers of Gisin states and we find that both measures exhibit a sudden change in terms of the mixing parameter. Furthermore, we show that entangled Gisin states contain nonclassical correlations that are captured by the local quantum uncertainty and cannot be revealed by the negativity quantifier.