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Zapiski Nauchnykh Seminarov POMI, 2016, Volume 448, Pages 270–285
(Mi znsl6317)
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This article is cited in 2 scientific papers (total in 2 papers)
The spectrum and separability of mixed two-qubit $X$-states
A. Khvedelidzeabc, A. Torosyand a A. Razmadze Mathematical Institute, Iv. Javakhishvili Tbilisi State University, Tbilisi, Georgia
b Institute of Quantum Physics and Engineering Technologies, Georgian Technical University, Tbilisi, Georgia
c National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409 Moscow, Russia
d Laboratory of Information Technologies, Joint Institute for Nuclear Research, 141980 Dubna, Russia
Abstract:
The separable mixed two-qubit $X$-states are classified in accordance with the degeneracies in the spectrum of density matrices. It is shown that there are four classes of separable $X$-states, among them: one four-dimensional family, a pair of two-dimensional families, and a single zero-dimensional maximally mixed state.
Key words and phrases:
group actions, Lie group orbits, quantum entanglement.
Received: 17.09.2016
Citation:
A. Khvedelidze, A. Torosyan, “The spectrum and separability of mixed two-qubit $X$-states”, Representation theory, dynamical systems, combinatorial methods. Part XXVII, Zap. Nauchn. Sem. POMI, 448, POMI, St. Petersburg, 2016, 270–285; J. Math. Sci. (N. Y.), 224:2 (2017), 349–359
Linking options:
https://www.mathnet.ru/eng/znsl6317 https://www.mathnet.ru/eng/znsl/v448/p270
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Abstract page: | 170 | Full-text PDF : | 53 | References: | 39 |
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