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Partial Fermionization: Spectral Universality in 1D Repulsive Bose Gases

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Hummel, Quirin ; Urbina, Juan Diego ; Richter, Klaus

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Date of publication of this fulltext: 09 Jul 2019 09:10


Because of the vast growth of the many-body level density with excitation energy, its smoothed form is of central relevance for spectral and thermodynamic properties of interacting quantum systems. We compute the cumulative of this level density for confined one-dimensional continuous systems with repulsive short-range interactions. We show that the crossover from an ideal Bose gas to the ...


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