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Full-Text Articles in Physical Sciences and Mathematics
Message Passing Techniques For Statistical Physics And Optimization In Complex Systems, Lin Bo
Message Passing Techniques For Statistical Physics And Optimization In Complex Systems, Lin Bo
Dissertations, Theses, and Capstone Projects
Optimization problem has always been considered as a central topic in various areas of science and engineering. It aims at finding the configuration of a large number of variables with which the objective function is optimal. The close relation between optimization problems and statistical physics through the probability measure of the Boltzmann type has brought new theoretical tools from statistical physics of disordered systems to optimization problems. In this thesis, we use message passing techniques, in particular cavity method, developed in the last decades within spin glass theory to study optimization problems in complex systems. In the study of force …
Second Quantum State Transition In Gaas/Algaas Resonant Bragg Structure Probed By Modulation Reflectance Spectroscopy, Yuechao Chen
Second Quantum State Transition In Gaas/Algaas Resonant Bragg Structure Probed By Modulation Reflectance Spectroscopy, Yuechao Chen
Dissertations, Theses, and Capstone Projects
Modulation spectroscopy, ever since its introduction by B.O. Seraphin in 1964, has been considered and widely used as a sensitive experiment technique for studying and characterizing the properties of varieties of semiconductor materials. Compared to general optical reflectance spectrum which measures the absolute reflection, the modulation spectroscopy evaluates the interpretation of the changes in the optical response from the sample caused by a periodic physical perturbation applied to the sample, such as temperature, electric fields, hydrostatic pressure, uniaxial stress, etc.Those modulation spectroscopies with an external electric field perturbation are known as electroreflectance spectroscopy, which provides sharp and derivative-like spectral features …