Spontaneous interlayer superfluidity in bilayer systems of cold polar molecules

ORAL

Abstract

Quantum degenerate cold-atom gases provide a remarkable opportunity to study strongly interacting systems. Recent experimental progress in producing ultracold polar molecules with a net electric dipole moment opens up new possibilities to realize novel quantum phases governed by the long-range and anisotropic dipole-dipole interactions. In this work we predict the existence of experimentally observable novel broken-symmetry states with spontaneous interlayer coherence in cold polar molecules. These exotic states appear due to strong repulsive interlayer interactions and exhibit properties of superfluids, ferromagnets and excitonic condensates.

*This work is supported by US-AFOSR-MURI and NSF-JQI-PFC.

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Authors

  • Roman Lutchyn

    • University of Maryland
    • Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, MD
    • Condensed Matter Theory Center and Joint Quantum Institute, Department of Physics, University of Maryland, College Park, Maryland, USA

  • Enrico Rossi

    • University of Maryland
    • Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, Maryland 20742-4111
    • CMTC, Department of Physics, University of Maryland

  • S. Das Sarma

    • University of Maryland
    • Condensed Matter Theory Center and Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park
    • Condensed Matter Theory Center and Joint Quantum Institute, Department of Physics, University of Maryland, College Park, MD 20742
    • Condensed Matter Theory Center and Joint Quantum Institute, Department of Physics, University of Maryland, College Park, Maryland, USA
    • University of Maryland, College Park
    • University of Maryland-College Park
    • Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park MD 20742-4111
    • Univ. of Maryland
    • University of Maryland, College Park, Maryland, USA
    • Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, Maryland 20742-4111