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We have investigated the one-dimensional spin-1/2 axial next-nearest-neighbour Ising (ANNNI) model in two orthogonal magnetic
fields at zero temperature. There are four different possible ground state configurations for the ANNNI model in a longitudinal
field, in the thermodynamic limit. The inclusion of a transverse field introduces quantum fluctuations which destroy the existing
spin order along certain critical lines. The effects of the fluctuations in three of the four ordered regions were investigated
using the finite-size scaling technique. The phase boundaries of the ANNNI model in two orthogonal magnetic fields were thus
determined numerically. For certain limits of the Hamiltonian we compared the obtained results with the existing literature
and our results were in good agreement with the results in the existing literature. 相似文献
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Heinz Kunle 《Mathematische Annalen》1961,144(4):302-322
Ohne Zusammenfassung 相似文献
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Heinz Kunle 《Mathematische Annalen》1961,144(2):142-161
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I. Olaposi Omotuyi Oyekanmi Nash O. Basiru Ajiboye C. Gift Iwegbulam E. Babatunji Oyinloye O. Abimbola Oyedeji Z. Abimbola Kashim Kunle Okaiyeto 《Journal of computational chemistry》2020,41(24):2158-2161
D614G spike glycoprotein (sgp) mutation in rapidly spreading severe acute respiratory syndrome coronavirus-2 (SARS-COV-2) is associated with enhanced fitness and higher transmissibility in new cases of COVID-19 but the underlying mechanism is unknown. Here, using atomistic simulation, a plausible mechanism has been delineated. In G614 sgp but not wild type, increased D(G)614-T859 Cα-distance within 65 ns is interpreted as S1/S2 protomer dissociation. Overall, ACE2-binding, post-fusion core, open-state and sub-optimal antibody-binding conformations were preferentially sampled by the G614 mutant, but not wild type. Furthermore, in the wild type, only one of the three sgp chains has optimal communication route between residue 614 and the receptor-binding domain (RBD); whereas, two of the three chains communicated directly in G614 mutant. These data provide evidence that D614G sgp mutant is more available for receptor binding, cellular invasion and reduced antibody interaction; thus, providing framework for enhanced fitness and higher transmissibility in D614G SARS-COV-2 mutant. 相似文献
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Ohne ZusammenfassungMit 12 Textabbildungen 相似文献
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Heinz Kunle 《Mathematische Zeitschrift》1956,64(1):270-285
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