Bosonic Kondo-Hubbard model

Abstract

We study, using quantum Monte-Carlo simulations, the bosonic Kondo-Hubbard model in a two dimensional square lattice. We explore the phase diagram and analyse the mobility of particles and magnetic properties. At unit filling, the transition from a paramagnetic Mott insulator to a ferromagnetic superfluid appears continuous, contrary to what was predicted with mean field. For double occupation per site, both the Mott insulating and superfluid phases are ferromagnetic and the transition is still continuous. Multiband tight binding Hamiltonians can be realized in optical lattice experiments, which offer not only the possibility of tuning the different energy scales over wide ranges, but also the option of loading the system with either fermionic or bosonic atoms.

References in corpus (7)

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• State preparation and dynamics of ultracold atoms in higher lattice orbitals
• Finite-size scaling method for the Berezinskii-Kosterlitz-Thouless transition
• Disorder in a Quantum Critical Superconductor
• The Stochastic Green Function (SGF) algorithm
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Cited by in corpus (5)

• Solving quantum impurity problems in and out of equilibrium with variational approach
• Quantum Rydberg Central Spin Model
• Variational principle for quantum impurity systems in and out of equilibrium: application to Kondo problems
• Efficient variational approach to dynamics of a spatially extended bosonic Kondo model
• Bosonic Peierls state emerging from the one-dimensional Ising-Kondo interaction