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Unveiling hidden structure of many-body wave functions of integrable systems via sudden-expansion experiments
Physical Review A
In the theory of Bethe-ansatz integrable quantum systems, rapidities play an important role as they are used to specify many-body states, apart from phases. The physical interpretation of rapidities going back to Sutherland is that they are the asymptotic momenta after letting a quantum gas expand into a larger volume making it dilute and noninteracting. We exploit this picture to make a direct connection to quantities that are accessible in sudden-expansion experiments with ultracold quantumdoi:10.1103/physreva.93.021607 fatcat:hlso5cdrfbfmpgyat6scbja7le