NMR dynamics of quantum discord for spin-carrying gas molecules in a closed nanopore
A local orthogonal transformation that transforms any centrosymmetric density matrix of a two-qubit system to the X form has been found. A piecewise-analytic-numerical formula Q = min{Q_π_/_2, Q_θ, Q_0}, where Q{sub π/2} and Q{sub 0} are analytical expressions and the branch Q{sub 0θ} can be obtained only by numerically searching for the optimal measurement angle θ ∈ (0, π/2), is proposed to calculate the quantum discord Q of a general X state. The developed approaches have been applied for a quantitative description of the recently predicted flickering (periodic disappearance and reappearance) of the quantum-information pair correlation between nuclear 1/2 spins of atoms or molecules of a gas (for example, {sup 129}Xe) in a bounded volume in the presence of a strong magnetic field.
- OSTI ID:
- 22309107
- Journal Information:
- Journal of Experimental and Theoretical Physics, Vol. 119, Issue 5; Other Information: Copyright (c) 2014 Pleiades Publishing, Inc.; This record replaces 46015280; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
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