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- W2034006854 abstract "We investigate one-dimensional SU$(N)$ Hubbard chains at zero temperature, which can be emulated with ultracold alkaline-earth-metal atoms, by using the density matrix renormalization group (DMRG), Bethe ansatz (BA), and bosonization. We compute experimental observables and use the DMRG to benchmark the accuracy of the Bethe ansatz for $N>2$ where the BA is only approximate. In the worst case, we find a relative error $ensuremath{varepsilon}ensuremath{lesssim}4%$ in the BA ground-state energy for $Nensuremath{leqslant}4$ at filling $1/N$, which is due to the fact that BA improperly treats the triply and higher occupied states. Using the DMRG for $Nensuremath{leqslant}4$ and the BA for large $N$, we determine the regimes of validity of strong- and weak-coupling perturbation theory for all values of $N$ and, in particular, the parameter range in which the system is well described by a SU$(N)$ Heisenberg model at filling $1/N$. We find this depends only weakly on $N$. We investigate the Berezinskii-Kosterlitz-Thouless phase transition from a Luttinger liquid to a Mott insulator by computing the fidelity susceptibility and the Luttinger parameter ${K}_{ensuremath{rho}}$ at $1/N$ filling. The numerical findings give strong evidence that the fidelity susceptibility develops a minimum at a critical interaction strength which is found to occur at a finite positive value for $N>2$." @default.
- W2034006854 created "2016-06-24" @default.
- W2034006854 creator A5012900046 @default.
- W2034006854 creator A5028285562 @default.
- W2034006854 creator A5036242744 @default.
- W2034006854 creator A5045820780 @default.
- W2034006854 creator A5067783194 @default.
- W2034006854 date "2011-10-03" @default.
- W2034006854 modified "2023-09-27" @default.
- W2034006854 title "SU<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mo>(</mml:mo><mml:mi>N</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:math>magnetism in chains of ultracold alkaline-earth-metal atoms: Mott transitions and quantum correlations" @default.
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