Physics – Quantum Physics
Scientific paper
1996-07-08
Physics
Quantum Physics
Revtex, 19 pages, to appear in Phys. Rev. A, vol. 54; one postscript figure available at request from fizrh@univ.gda.pl
Scientific paper
10.1103/PhysRevA.54.1838
Information-theoretic aspects of quantum inseparability of mixed states are investigated in terms of the $\alpha$-entropy inequalities and teleportation fidelity. Inseparability of mixed states is defined and a complete characterization of the inseparable $2\times2$ systems with maximally disordered subsystems is presented within the Hilbert-Schmidt space formalism. A connection between teleportation and negative conditional $\alpha$-entropy is also emphasized.
Horodecki Michal
Horodecki Ryszard
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