Optical Conductivity of Ultra-Cold Bosons in Optical Lattices

• Authors: B. Grygiel , K. Patucha , T. Zaleski
• Languages of publication: EN

Abstracts

EN

We study ultra-cold bosonic systems in optical lattice using quantum rotor approach to calculate the current-current correlations, which provides the information about conductivity of the system. The method allows us to go beyond mean-field approximation and track the behavior of the real part of the conductivity along the phase transition between the Mott insulator and superfluid state for various geometries of the lattice. In the phase-ordered state at zero temperature, a discrete ingredient appears resulting from the long-range coherence in the system.

Keywords

EN

67.85.Hj   05.30.Jp   03.75.Lm  

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2016
• Volume: 130
• Issue: 2
• Pages: 633-636

Dates

published

2016-08

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Identifiers

DOI

10.12693/APhysPolA.130.633