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Published online by Cambridge University Press: 02 December 2021
This chapter discusses metastable states or resonances in quantum mechanics. It develops different techniques to compute their complex energies, like complex dilatation techniques, and the uniform and the exact WKB method. The cubic and the inverted quartic oscillators are discussed in detail to exemplify these procedures. Finally, the chapter discusses the analytic continuation of eigenvalue problems, and the path integral formulation of metastable states.
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