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Q: Fachverband Quantenoptik und Photonik

Q 9: Quantum gases (Bosons) I

Q 9.7: Vortrag

Montag, 9. März 2020, 15:45–16:00, e214

Superfluid phases of dipolar gases in low dimensions — •Rebecca Kraus¹, Krzysztof Biedroń², Jakub Zakrzewski^2,3, and Giovanna Morigi¹ — ¹Theoretische Physik, Universität des Saarlandes, D-66123 Saarbrücken, Germany — ²Instytut Fizyki imienia Mariana Smoluchowskiego, Uniwersytet Jagielloński, Łojasiewicza 11, 30-048 Kraków, Poland — ³Mark Kac Complex Systems Research Center, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland

We determine the quantum ground state of ultracold dipolar bosons by means of DMRG. The bosons are confined in an optical lattice in a quasi-one dimensional geometry, their dynamics is modeled by an extended Bose-Hubbard model whose terms and coefficients account for the power-law decay of the dipolar potential and of its spatial anisotropy. We show that the dipolar interactions give rise to superfluid phases at vanishing kinetic energies, which exhibit a site-dependent phase. We characterize these phases as a function of the Bose-Hubbard parameters and analyse the entanglement entropy as a function of the strength of the dipolar interactions.