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arXiv · 0901.2512

Correlations in a two-dimensional Bose gas with long range interactions

B. Laikhtman·R. Rapaport
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Abstract

We study the correlations of two-dimensional dipolar excitons in coupled quantum wells with a dipole -- dipole repulsive interaction. We show that at low concentrations, the Bose degeneracy of the excitons is accompanied by strong multi-particle correlations and the system behaves as a Bose liquid. At high concentration the particles interaction suppresses quantum coherence and the system behaves similar to a classical liquid down to a temperature lower than typical for a Bose gas. We evaluate the interaction energy per particle and the resulting blue shift of the exciton luminescence that is a direct tool to measure the correlations. This theory can apply to other systems of bosons with extended interaction.

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B. Laikhtman, R. Rapaport. 2009-01-16. Correlations in a two-dimensional Bose gas with long range interactions. https://doi.org/10.1209/0295-5075/87/27010

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