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

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

2007-12-08

arxiv.org/abs/0712.1251v2

Phys. Rev. Lett. 101, 096401 (2008)

Physics

Condensed Matter

Other Condensed Matter

5 pages; 3 figures

Scientific paper

10.1103/PhysRevLett.101.096401

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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