Nonequilibrium dynamics in one-dimensional strongly interacting two-component gases
arXiv:2308.00486 · doi:10.1103/PhysRevA.108.053304
Abstract
The derivation of determinant representations for the space-, time-, and temperature-dependent correlation functions of the impenetrable Gaudin-Yang model in the presence of a trapping potential is presented. These representations are valid in both equilibrium and nonequilibrium scenarios like the ones initiated by a sudden change of the confinement potential. In the equal-time case our results are shown to be equivalent to a multicomponent generalization of Lenard's formula from which Painlevé transcendent representations for the correlators can be obtained in the case of harmonic trapping and Dirichlet and Neumann boundary conditions. For a system in the quantum Newton's cradle setup the determinant representations allow for an exact numerical investigation of the dynamics and even hydrodynamization which is outside the reach of Generalized Hydrodynamics or other approximate methods. In the case of a sudden change in the trap's frequency we predict a many-body bounce effect, not present in the evolution of the density profile, which causes a nontrivial periodic narrowing of the momentum distribution with amplitude depending on the statistics of the particles.
arXiv comment32 pages, 5 figures, RevTeX 4.2
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