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10 papers · 1 filter
Disorder-to-order transition in the magnetic and electronic properties of URh_2Ge_2
S. Suellow, S. A. M. Mentink, T. E. Mason +4
We present a study of annealing effects on the physical properties of tetragonal single--crystalline URh_2Ge_2. This system, which in as-grown form was recently established as the…
Magnetotransport in the low carrier density ferromagnet EuB_6
S. Suellow, I. Prasad, S. Bogdanovich +3
We present a magnetotransport study of the low--carrier density ferromagnet EuB_6. This semimetallic compound, which undergoes two ferromagnetic transitions at T_l = 15.3 K and T_c…
Evaluating capacities of Bosonic Gaussian channels
A. S. Holevo, R. F. Werner
We show how to compute or at least to estimate various capacity-related quantities for Bosonic Gaussian channels. Among these are the coherent information, the entanglement assiste…
The Rate of Optimal Purification procedures
M. Keyl, R. F. Werner
Purification is a process in which decoherence is partially reversed by using several input systems which have been subject to the same noise. The purity of the outputs generally i…
Optical absorption of spin ladders
C. Jurecka, W. Brenig
We present a theory of phonon-assisted optical two-magnon absorption in two-leg spin-ladders. Based on the strong intra-rung-coupling limit we show that collective excitations of t…
EPR states for von Neumann algebras
R. F. Werner
In a recent paper [quant-ph/9910066], Arens and Varadarajan gave a characterization of what they call EPR-states on a bipartite composite quantum system. By definition, such states…