Strong interactions in a large 1D quantum gas induce a crossover to 3D behavior, causing failure of standard 1D models and producing distinct breathing-mode frequency plateaus from 1D and 3D hydrodynamics.
ε(k) = ℏ2k2 2m − µ − kBT c π Z ∞ −∞ dq ln 1 + e− ε(q) kB T c2 + (k − q)2 , (A1) where k is the quasi-momentum defined by the Bethe Ansatz wavefunction and ϵk is the dressed energy
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Strong interaction induced dimensional crossover in 1D quantum gas
Strong interactions in a large 1D quantum gas induce a crossover to 3D behavior, causing failure of standard 1D models and producing distinct breathing-mode frequency plateaus from 1D and 3D hydrodynamics.