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Distinguish non-degenerate and degenerate cases and use appropriate methods.
Perform calculations using the time-independent perturbation theory.
Describe absorption and stimulated emission processes.
Obtain approximate solutions using the variational method.
Time-independent Perturbation Theory
In this module we will introduce the course on approximation methods commonly used in quantum mechanics and then discuss time-independent perturbation theory. We will first discuss non-degenerate perturbation theory and derive useful formulas for the first- and second-order corrections. We will then discuss degenerate perturbation theory. We will also discuss specific examples where the various perturbation methods are used - Stark effect, fine structure and Zeeman effect.
Time-dependent Perturbation TheoryIn this module, we will introduce interaction picture and derive time evolution equations. After discussing a simple but illuminating example of two-state system, we develop time-dependent perturbation theory and discuss the probability of transitions between quantum states induced by external perturbation.
Other Approximation MethodsThis module covers several non-perturbative approximation methods. They are the tight binding method, variational method and the use of finite basis set.
This course can also be taken for academic credit as ECEA 5612, part of CU Boulder’s Master of Science in Electrical Engineering degree. This course teaches commonly used approximation methods in quantum mechanics. They include time-independent perturbation theory, time-dependent perturbation theory, tight binding method, variational method and the use of finite basis set. In each case, a specific example is given to clearly show how the method works. At the end of this course learners will b
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