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Superfluidity of Flexible Chains of Polar Molecules

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Abstract

We study quantum chains formed 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 reveal its quantum roughening transition. The case of finite in-layer density of molecules is analyzed within the J-current model approximation, and it is found that N-layered 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 the chain formation is proposed.

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Authors and Affiliations

  1. Institute for Theoretical Atomic, Molecular and Optical Physics, Harvard-Smithsonian Center of Astrophysics, Cambridge, MA, 02138, USA

    B. Capogrosso-Sansone

  2. Department of Engineering Science and Physics, CSI, CUNY, Staten Island, NY, 10314, USA

    A. B. Kuklov

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  1. B. Capogrosso-Sansone
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  2. A. B. Kuklov
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Correspondence to A. B. Kuklov.

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Capogrosso-Sansone, B., Kuklov, A.B. Superfluidity of Flexible Chains of Polar Molecules. J Low Temp Phys 165, 213–226 (2011). https://doi.org/10.1007/s10909-011-0386-5

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  • DOI: https://doi.org/10.1007/s10909-011-0386-5

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