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121.
Frédéric Dupuis Mario Berta Jürg Wullschleger Renato Renner 《Communications in Mathematical Physics》2014,328(1):251-284
If a quantum system A, which is initially correlated to another system, E, undergoes an evolution separated from E, then the correlation to E generally decreases. Here, we study the conditions under which the correlation disappears (almost) completely, resulting in a decoupling of A from E. We give a criterion for decoupling in terms of two smooth entropies, one quantifying the amount of initial correlation between A and E, and the other characterizing the mapping that describes the evolution of A. The criterion applies to arbitrary such mappings in the general one-shot setting. Furthermore, the criterion is tight for mappings that satisfy certain natural conditions. One-shot decoupling has a number of applications both in physics and information theory, e.g., as a building block for quantum information processing protocols. As an example, we give a one-shot state merging protocol and show that it is essentially optimal in terms of its entanglement consumption/production. 相似文献
122.
Ivan S. Ristić Zoran D. Bjelović Berta Holló Katalin Mészáros Szécsényi Jaroslava Budinski-Simendić Nada Lazić Miodrag Kićanović 《Journal of Thermal Analysis and Calorimetry》2013,111(2):1083-1091
Preparation of the series of polyurethane elastomers and its nanocomposites from castor oil (a vegetable triglyceride) and different isocyanates (aromatic: toluene diisocyanate, TDI and aliphatic: isophorone diisocyanate, IPDI) is described. The synthesis was carried out in bulk and without catalyst by a one-step reactive process. Different elastomers were prepared by using several stoichiometric imbalances. For polyurethane nanocomposites based on TDI, titanium(IV) oxide nanoparticles was used. The thermal properties of the materials are discussed on the basis of simultaneous TG-DSC measurements results and TMDSC data. TMDSC results show that T g increases with increasing r = NCO/OH ratio. Namely, with increasing NCO/OH ratio the cross-linkage density increases and as a consequence, the chain mobility decreases, resulting in a higher T g. It was estimated that the T g of the samples decreased as the nanofiller content increased due to the changes in the segmental mobility in polyurethane materials. Thermal data refers to increased stability of nanocomposites compared with that of the unfilled elastomers. 相似文献
123.
J. F. Reith J. Hoffmann F. Hernegger und Berta Karlik 《Fresenius' Journal of Analytical Chemistry》1944,127(1):217-218
Ohne Zusammenfassung 相似文献
124.
Franguelli Fernanda Paiva Barta-Holló Berta Petruševski Vladimir M. Sajó Istvan E. Klébert Szilvia Farkas Attila Bódis Eszter Szilágyi Imre Miklós Pawar Rajendra P. Kótai László 《Journal of Thermal Analysis and Calorimetry》2021,145(6):2907-2923
Journal of Thermal Analysis and Calorimetry - Detailed vibrational (IR, Raman, far-IR) and thermal (TGA, TG–MS, DSC) analysis has been performed on... 相似文献
125.
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127.
Berta Holló Marko V. Rodić Oskar Bera Mirjana Jovičić Vukadin M. Leovac Zoran D. Tomić Katalin Mészáros Szécsényi 《Structural chemistry》2013,24(6):2193-2201
The crystal and molecular structure of [Cu(ampf)(ClO4)(MeOH)2]ClO4, (1), ampf = N,N′-bis(4-acetyl-5-methylpyrazol-3-yl)formamidine, determined by X-ray crystallography is described and compared with the structurally related copper(II) complexes, formed under similar experimental conditions, using CuII salts with different anions. The complex formation is discussed in view of the structures of cobalt(II) and nickel(II) complexes with the same organic ligand and different anions, also formed under similar reaction conditions. Solvent molecules coordinated to the central atom play an important role in biologic systems. To get a better insight into the desolvation mechanism, in this study the desolvation pattern of 1 is presented. As in literature little attention is paid to the desolvation mechanism of solvate complexes, the desolvation mechanism of three, potentially biologically active isostructural pairs of octahedral NiII and CoII compounds with ampf and dmpc (3,5-dimethyl-1H-pyrazole-1-carboxamidine) ligands are evaluated and compared with the desolvation of 1. The results of the thermal data are discussed on the basis of structural features of the compounds. The minor differences in structures of the related compounds cannot be straightforwardly connected with the different solvent evaporation mechanism. To explain the differences found in desolvation pattern in isostructural CoII and NiII complexes the Jahn-Teller effect is proposed. 相似文献
128.
N-substituted-N-glycolyl-1,2-diphenylaminoethanol derivatives were synthesized from the related N-substituted-1,2-diphenylaminoethanols by transformation into N-substituted-2,3-dioxo-5,6-diphenylmorpholines, and subsequent reduction with NaBH4/EtOH. 相似文献
129.
130.
We characterize finite groups in which the permutability-graph has more than one connected component.Research partially supported by G.N.S.A.G.A. of C.N.R. and M.U.R.S.T. of Italy. 相似文献