Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-03-17
Comp. Phys. Comm. 182, 2036 (2011)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, 4 figures, Proceedings of the Conference on Computational Physics CCP, June 2010, Trondheim, Norway
Scientific paper
10.1016/j.cpc.2011.02.004
Light-matter systems allow to realize a strongly correlated phase where photons are present. In these systems strong correlations are achieved by optical nonlinearities, which appear due to the coupling of photons to atomic-like structures. This leads to intriguing effects, such as the quantum phase transition from the Mott to the superfluid phase. Here, we address the two-dimensional Jaynes-Cummings lattice model. We evaluate the boundary of the quantum phase transition and study polaritonic properties. In order to be able to characterize polaritons, we investigate the spectral properties of both photons as well as two-level excitations. Based on this information we introduce polariton quasiparticles as appropriate wavevector, band index, and filling dependent superpositions of photons and two-level excitations. Finally, we analyze the contributions of the individual constituents to the polariton quasiparticles.
Arrigoni Enrico
der Linden Wolfgang von
Knap Michael
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