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arXiv · 1101.1901

Superfluidity of flexible chains of polar molecules

Barbara Capogrosso-Sansone·Anatoly Kuklov
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Abstract

We study properties of quantum chains in a gas of polar bosonic molecules confined in a stack of N identical one- and two- dimensional optical lattice layers, with molecular dipole moments aligned perpendicularly to the layers. Quantum Monte Carlo simulations of a single chain (formed by a single molecule on each layer) reveal its quantum roughening transition. The case of finite in-layer density of molecules is studied within the framework of the J-current model approximation, and it is found that N-independent molecular superfluid phase can undergo a quantum phase transition to a rough chain superfluid. A theorem is proven that no superfluidity of chains with length shorter than N is possible. The scheme for detecting chain formation is proposed.

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Barbara Capogrosso-Sansone, Anatoly Kuklov. 2011-06-05. Superfluidity of flexible chains of polar molecules. https://doi.org/10.1007/s10909-011-0386-5

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