Real and Imaginary Part of Conductivity of Strongly Interacting Bosons in Optical Lattices |
| B. Grygiel, K. Patucha, T. Zaleski
Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wrocław, Poland |
| Full Text PDF |
| We calculate the conductivity of strongly interacting bosons described by the Bose-Hubbard model in a two-dimensional lattice in controlled gauge potential acting as a uniform external magnetic field. In such scenario, two types of conductivity can be distinguished: intra- and inter-band. The interband contribution, usually omitted in analysis of multiband systems, appears to have a crucial role in the transport properties as its values are a few orders of magnitude greater than the intraband one. |
DOI:10.12693/APhysPolA.135.69 PACS numbers: 67.85.Hj, 05.30.Jp, 03.75.Lm |