Quantum Field Theory
The Bethe Ansatz is a powerful mathematical technique used to solve certain one-dimensional quantum many-body systems, particularly in the context of integrable models. It provides a way to construct wave functions for these systems by using a set of parameters known as rapidities, which describe the momenta of the particles involved. This method connects closely to both quantum field theory and condensed matter physics, revealing deep insights into the behavior of quantum systems, especially in terms of their energy spectra and correlations.
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