Interlayer superfluidity in bilayer systems of fermionic polar molecules

A. Pikovski 1, M. Klawunn 1, 2, G. V. Shlyapnikov 3, 4, L. M.N.B.F. Santos 1

Physical Review Letters 105 (2010) 215302

We consider fermionic polar molecules in a bilayer geometry where they are oriented perpendicularly to the layers, which permits both low inelastic losses and superfluid pairing. The dipole-dipole interaction between molecules of different layers leads to the emergence of interlayer superfluids. The superfluid regimes range from BCS-like fermionic superfluidity with a high $T_c$ to Bose-Einstein (quasi-)condensation of interlayer dimers, thus exhibiting a peculiar BCS-BEC crossover. We show that one can cover the entire crossover regime under current experimental conditions.

  • 1. Institut fur Theoretische Physik,
    Leibniz Universität Hannover
  • 2. INO-CNR BEC,
    Universita di Trento
  • 3. Laboratoire de Physique Théorique et Modèles Statistiques (LPTMS),
    CNRS : UMR8626 – Université Paris XI - Paris Sud
  • 4. Van der Waals-Zeeman Institute,
    University of Amsterdam