Circulant States with Vanishing Quantum Discord
نویسندگان
چکیده
منابع مشابه
Circulant States with Vanishing Quantum Discord
Quantum state of composite system contains both classical and quantum correlation. Usually by quantum correlations one means quantum entanglement which provides an essential resource for quantum information processing such as quantum cryptography, dense coding, quantum computing [1, 2]. However, a quantum state of a composed system may contain other types of nonclassical correlation even if it ...
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Paolo Giorda,1 Michele Allegra,1,2,3 and Matteo G. A. Paris4,5 1Institute for Scientific Interchange Foundation (ISI), I-10126 Torino, Italy 2Dipartimento di Fisica, Università di Torino, I-10125 Torino, Italy 3INFN, Sezione di Torino, I-10125 Torino, Italy 4Dipartimento di Fisica, Università degli Studi di Milano, I-20133 Milano, Italy 5CNISM, Unità di Milano, I-20133 Milano, Italy (Received 1...
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Mazhar Ali,1,3,* A. R. P. Rau,2 and G. Alber1 1Institut für Angewandte Physik, Technische Universität Darmstadt, Darmstadt D-64289, Germany 2Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA 3Department of Electrical Engineering, COMSATS Institute of Information Technology, Abbottabad 22060, Pakistan (Received 18 February 2010; published 12 April...
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Quantum discord Q is a function of density matrix elements. The domain of such a function in the case of two-qubit system with X density matrix may consist of three subdomains at most: two ones where the quantum discord is expressed in closed analytical forms (Q π/2 and Q 0) and an intermediate subdomain for which, to extract the quantum discord Q θ , it is required to solve in general numerica...
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ژورنال
عنوان ژورنال: Open Systems & Information Dynamics
سال: 2012
ISSN: 1230-1612,1793-7191
DOI: 10.1142/s1230161212500060