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arXiv · 0712.1251

Quantum Phase Transition between (Luttinger) Liquid and Gas of Cold Molecules

K. T. Law·D. E. Feldman
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Abstract

We consider cold polar molecules confined in a helical optical lattice similar to those used in holographic microfabrication. An external electric field polarizes molecules along the axis of the helix. The large-distance inter-molecular dipolar interaction is attractive but the short-scale interaction is repulsive due to geometric constraints and thus prevents collapse. The interaction strength depends on the electric field. We show that a zero-temperature second-order liquid-gas transition occurs at a critical field. It can be observed under experimentally accessible conditions.

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K. T. Law, D. E. Feldman. 2007-12-12. Quantum Phase Transition between (Luttinger) Liquid and Gas of Cold Molecules. https://doi.org/10.1103/physrevlett.101.096401

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