Email this article The Spectrum and Separability of Mixed Two-Qubit X-States
- Authors: Khvedelidze A.1,2,3, Torosyan A.4
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Affiliations:
- A. Razmadze Mathematical Institute, Iv. Javakhishvili Tbilisi State University
- Institute of Quantum Physics and Engineering Technologies, Georgian Technical University
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
- Laboratory of Information Technologies, Joint Institute for Nuclear Research
- Issue: Vol 224, No 2 (2017)
- Pages: 349-359
- Section: Article
- URL: https://journals.rcsi.science/1072-3374/article/view/239590
- DOI: https://doi.org/10.1007/s10958-017-3421-5
- ID: 239590
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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.
About the authors
A. Khvedelidze
A. Razmadze Mathematical Institute, Iv. Javakhishvili Tbilisi State University; Institute of Quantum Physics and Engineering Technologies, Georgian Technical University; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Author for correspondence.
Email: akhved@jinr.ru
Georgia, Tbilisi; Tbilisi; Moscow
A. Torosyan
Laboratory of Information Technologies, Joint Institute for Nuclear Research
Email: akhved@jinr.ru
Russian Federation, Dubna
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