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• W2206474178 abstract "Interacting one-dimensional quantum systems play a special role among few- and many-body models as exact solutions can be obtained for the homogenous case using the Bethe ansatz and bosonization techniques. Unfortunately, these approaches are not applicable when external confinement is present unless some variation of the local density approximation is employed. Recent theoretical advances beyond the Bethe ansatz and bosonization allow us to predict the behavior of one-dimensional confined quantum systems with strong short-range interactions, and new experiments with cold atomic Fermi gases have already confirmed these theories. Here we demonstrate that a simple linear combination of the strongly interacting solution with the well-known solution in the limit of vanishing interactions provides a simple and accurate description of the system for all values of the interaction strength. This indicates that one can indeed capture the physics of confined one-dimensional systems by knowledge of the limits using wave functions that are much easier to handle than the output of typical numerical approaches. We demonstrate our scheme for experimentally relevant systems with up to six particles. Moreover, we show that our method works also in the case of mixed systems of particles with different masses. This is an important feature because these systems are known to be non-integrable and thus not solvable by the Bethe ansatz technique." @default.
• W2206474178 created "2016-06-24" @default.
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• W2206474178 date "2015-12-30" @default.
• W2206474178 modified "2023-09-27" @default.
• W2206474178 title "An interpolatory ansatz for describing one-dimensional confined Fermi systems" @default.
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