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arXiv · 1502.03214

Competing structures in 2D-trapped dipolar gases

Barbara Gränz·Sergey E. Korshunov·Vadim B. Geshkenbein·Gianni Blatter
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Abstract

We study a system of dipolar molecules confined in a two-dimensional trap and subject to an optical square lattice. The repulsive long-range dipolar interaction $D/r^3$ favors an equilateral triangular arrangement of the molecules, which competes against the square symmetry of the underlying optical lattice with lattice constant $b$ and amplitude $V$. We find the minimal-energy states at the commensurate density $n = 1/b^2$ and establish the complete square-to-triangular transformation pathway of the lattice with decreasing $V$ involving period-doubled, solitonic, and distorted-triangular configurations.

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Barbara Gränz, Sergey E. Korshunov, Vadim B. Geshkenbein, Gianni Blatter. 2015-02-11. Competing structures in 2D-trapped dipolar gases. https://arxiv.org/abs/1502.03214

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