Spectral properties of strongly correlated bosons in two-dimensional optical lattices

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Spectral properties of the two-dimensional Bose-Hubbard model, which emulates ultracold gases of atoms confined in optical lattices, are investigated by means of the variational cluster approach. The phase boundary of the quantum phase transition from Mott phase to superfluid phase is calculated and compared to recent work. Moreover the single-particle spectral functions in both the first and the second Mott lobe are presented and the corresponding densities of states and momentum distributions are evaluated. A qualitatively similar intensity distribution of the spectral weight can be observed for spectral functions in the first and the second Mott lobe.
Original languageEnglish
Pages (from-to)024301
Number of pages1
JournalPhysical Review / B
Volume81
Issue number2
DOIs
Publication statusPublished - 2010

Treatment code (Nähere Zuordnung)

  • Theoretical

Fingerprint Dive into the research topics of 'Spectral properties of strongly correlated bosons in two-dimensional optical lattices'. Together they form a unique fingerprint.

  • Projects

    Strongly-Correlated-Many-Body-Problems

    Aichhorn, M., Pippan, P., Fulterer, A. M., Neuber, D. R., Knap, M., Evertz, H. G., Michel, F., von der Linden, W., Arrigoni, E. & Daghofer, M.

    1/01/98 → …

    Project: Research area

    Doctoral Program: Numerical Simulations in Technical Siences

    Gamillscheg, R., CHEN, C., Walchshofer, C., Tchoualag, L., Stadler, M., Sextro, W., Beer, G., Steinbach, O., Biro, O., Steiner, H., Schanz, M., von der Linden, W. & Brenn, G.

    1/10/0731/12/10

    Project: Research project

    Cite this