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Dokumentacja systemu dLibra 4.0
Get PDFArchiwalna dokumentacja systemu dLibra w wersji 4.0 - ostatnia wersja dokumentacji dla tej wersji systemu
No full textPoznańTranslocation is modeled with the Rubinstein-Duke rules for hopping reptons along a one-dimensional lattice (tube). Identification of some coupled states guarantees a semi-periodicity of the process. The chain is driven through the pore by a bias potential promoting the transition of stored length in one direction. Accounting exactly for all allowed states the translocation time of polymers up to the 10-links length is determined. The crossover from reptation to faster dynamics through gradually allowing hernia creation and annihilation is found. Some computational details are presented
No full textPoznańElectrophonon resonance (EPR) effects are investigated in cylindrical quantum wires (CQWR) in the presence of a laser field using a projection technique. We obtain the analytical expressions and graphs of absorption power. From graphs of the absorption power we obtain line-widths as a profile of the curves. The dependence of line-widths on different factors is considered. The conditions for EPR and optically detected electrophonon resonance (ODEPR) are also discussed
No full textPoznańThe Einstein crystal method was used to determine free energy differences between some crystalline structures of hard, homonuclear tetramers. The tetramers, each built of four identical hard spheres centered on vertices of a regular tetrahedron of sides equal to the sphere diameter, were arranged in such a way that the spheres formed the fcc lattice at close packing. Various sample sizes were studied and the results were extrapolated to the thermodynamic limit. It was found that the simplest structure of the tetramers, a simple cubic lattice of molecular mass centres with all the molecules having the same orientation, shows the highest free energy amongst the studied ones. The most stable structure of the studied ones was also found
No full textPoznańIn the note, recent efforts to derive fractional quantum mechanics are recalled. Some applications of a fractional approach to the Schrödinger equation are discussed as well
