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- W1666402022 abstract "We study equilibrium density and spin density profiles for a model of cold one-dimensional spin 1/2 fermions interacting via inverse square interaction and exchange in an external harmonic trap. This model is the well-known spin-Calogero model (sCM) and its fully nonlinear collective field theory description is known. We extend the field theory description to the presence of an external harmonic trap and obtain analytic results for statics and dynamics of the system. For instance, we find how the equilibrium density profile changes upon tuning the interaction strength. The results we obtain for equilibrium configurations are very similar to the ones obtained recently by Ma and Yang [1] for a model of fermions with short ranged interactions. Our main approximation is the neglect of the terms of higher order in spatial derivatives in equations of motion - gradientless approximation [2]. Within this approximation the hydrodynamic equations of motion can be written as a set of decoupled forced Riemann-Hopf equations for the dressed Fermi momenta of the model. This enables us to write analytical solutions for the dynamics of spin and charge. We describe the time evolution of the charge density when an initial non-equilibrium profile is created by cooling the gas with an additional potential in place and then suddenly removing the potential. We present our results as a simple single-particle evolution in the phase-space reminiscing a similar description of the dynamics of non-interacting one-dimensional fermions." @default.
- W1666402022 created "2016-06-24" @default.
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- W1666402022 date "2011-05-01" @default.
- W1666402022 modified "2023-10-06" @default.
- W1666402022 title "Cold Fermi gas with inverse square interaction in a harmonic trap" @default.
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- W1666402022 doi "https://doi.org/10.1016/j.nuclphysb.2010.12.015" @default.
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