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- W3101477801 abstract "We investigate the ground state properties of a lattice trapped bosonic system coupled to a Lieb-Liniger type gas. Our main goal is the description and in depth exploration and analysis of the two-species many-body quantum system including all relevant correlations beyond the standard mean-field approach. To achieve this, we use the Multi-Configuration Time-Dependent Hartree method for Mixtures (ML-MCTDHX). Increasing the lattice depth and the interspecies interaction strength, the wave function undergoes a transition from an uncorrelated to a highly correlated state, which manifests itself in the localization of the lattice atoms in the latter regime. For small interspecies couplings, we identify the process responsible for this cross-over in a single-particle-like picture. Moreover, we give a full characterization of the wave function's structure in both regimes, using Bloch and Wannier states of the lowest band, and we find an order parameter, which can be exploited as a corresponding experimental signature. To deepen the understanding, we use an effective Hamiltonian approach, which introduces an induced interaction and is valid for small interspecies interaction. We finally compare the ansatz of the effective Hamiltonian with the results of the ML-MCTDHX simulations." @default.
- W3101477801 created "2020-11-23" @default.
- W3101477801 creator A5035144532 @default.
- W3101477801 creator A5064525551 @default.
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- W3101477801 date "2018-03-29" @default.
- W3101477801 modified "2023-09-26" @default.
- W3101477801 title "Correlation induced localization of lattice trapped bosons coupled to a Bose–Einstein condensate" @default.
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- W3101477801 doi "https://doi.org/10.1088/1367-2630/aab5e2" @default.
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