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Rostock 2019 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 52: Quantum Gases (Bosons) V

Q 52.5: Talk

Thursday, March 14, 2019, 15:00–15:15, S HS 037 Informatik

Entanglement Entropy for extended Bose Hubbard model — •Shraddha Sharma1, Rebecca Kraus1, Astrid E. Niederle2, and Giovanna Morigi11Theoretical Physics, Saarland University, Campus E2.6, D--66123 Saarbrucken, Germany — 2Fraunhofer Institute for Experimental Software Engineering IESE, 67663 Kaiserslautern, Germany and

We consider a bosonic gas in a two-dimensional optical lattice. The atoms interact via s-wave scattering and via long range interactions induced by the coupling with a cavity. We determine the phase diagram when the optical lattice wavelength is incommensurate with the cavity mode wavelength using a mean-field ansatz. In this regime we observe, in addition to the Mott-insulator and the superfluid, also a Bose-Glass and a superglass phase, where the density distribution supports the formation of a stable intracavity field. Using the slave-boson approach, we probe the effect of pumping on entanglement and density-correlation.

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