Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Mean-field approximations"”.
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Examining mean-field approximations and Bogoliubov-de Gennes (BdG) equations for topological quantum computing - some considerations on the conceptual basis of Majorana zero modes in p+ip superconductors
… for topological quantum computing is based on mean-field approximations and is derived from solutions to BdG equations. In this framework, particle number conservation is broken and non-interacting fermion Hamiltonian is used to describe physics of interest. We argue that these features in the …
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A mean-field method for driven diffusive systems based on maximum entropy principle
… propose a method for generating a hierarchy of mean-field approximations to study the properties of the driven diffusive Ising model at nonequilibrium steady state. In addition, the present study offers a demonstration of the practical application of the information theoretic methods to a simple …
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Properties and Behaviours of Fuzzy Cellular Automata
… homogeneous asymptotic states are equivalent to mean field approximations of Boolean cellular automata. We then turn our attention the asymptotic behaviour of fuzzy cellular automata. In the second half of the thesis we investigate the observed behaviours of the fuzzy cellular automata derived …
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Quantum simulations in interacting Rydberg synthetic dimensions
… of Rydberg states via engineered microwave (MW) fields, we construct synthetic lattices in which internal atomic states serve as spatial sites. This framework emulates particle transport through designed lattice geometries while offering precise control over dimensionality, connectivity, and …
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Control of stochastically interacting systems on networks
… representative examples of such systems from the fields of spreading processes, smart manufacturing, and transport phenomena. In the first part of the thesis, control of spreading processes on lattices is considered. Analysis and control of spreading processes is difficult because the …
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Optimization problems in networks and queues
… interacting population centers. Unlike classical mean-field approaches, the model directly characterizes the underlying stochastic dynamics and proves the existence of a sharp extinction threshold: when the curing rate exceeds this threshold, the expected extinction time scales logarithmically …
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Thermodynamics of oxygen ordering in YBa₂Cu₃O₆₊
… of short range cluster probabilities defined in mean field approximations to the 2D lattice gas models. Based upon this connection, a thermo dynamical model is developed, which takes into account interactions between oxygen atoms and the additional spin and charge degrees of freedom, assuming a …
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A study on the effect of lateral interactions on methanation over Fe(100)
… investigated in this thesis and in both cases, mean field approximations and quasi chemical approximation (QCA) were used and compared to incorporate lateral interactions into the kinetics. The mean field approximation over estimates the lateral interactions and considers global coverage while …
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Estudio analítico de Coupled Map Lattices débilmente acoplados
… studied both in the nearest neighbor and in the mean field approximations. This overall approach allows on one hand to use analytical tools where re-searchers need them and on the other hand results are useful for all CML irrespective of the underlying branch of science (natural sciences, social …