Ultracold heteronuclear molecules and ferroelectric superfluids

Abstract

We analyze the possibility of a ferroelectric transition in heteronuclear molecules consisting of Bose-Bose, Bose-Fermi or Fermi-Fermi atom pairs. This transition is characterized by the appearance of a spontaneous electric polarization below a critical temperature. We discuss the existence of a ferroelectric Fermi liquid phase for Fermi molecules and the existence of a ferroelectric superfluid phase for Bose molecules characterized by the coexistence of ferroelectric and superfluid orders. Lastly, we propose an experiment to detect ferroelectric correlations through the observation of coherent dipole radiation pulses during time of flight.

4 pages and 3 figures

References in corpus (17)

• A quasi-pure Bose-Einstein condensate immersed in a Fermi sea
• Bose-Einstein condensation in trapped dipolar gases
• Optical Production of Ultracold Polar Molecules
• Two-species mixture of quantum degenerate Bose and Fermi gases
• A two atomic species superfluid
• Fermi-Bose quantum degenerate ^40 K - ^87 Rb mixture with attractive interaction
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• Observation of Feshbach resonances between two different atomic species
• Photoassociative Production and Trapping of Ultracold KRb Molecules
• Production and state-selective detection of ultracold, ground state RbCs molecules
• Coherent optical transfer of Feshbach molecules to a lower vibrational state
• Superfluid pairing in a polarized dipolar Fermi gas
• Feshbach spectroscopy of a K-Rb atomic mixture
• Quantum-degenerate mixture of fermionic lithium and bosonic rubidium gases
• Continuous loading of an electrostatic trap for polar molecules

Cited by in corpus (6)

• Cold and Ultracold Molecules: Science, Technology, and Applications
• Interaction induced ferro-electricity in the rotational states of polar molecules
• Collective phenomena in quasi-two-dimensional fermionic polar molecules: band renormalization and excitons
• Dynamical properties of a trapped dipolar Fermi gas at finite temperature
• Phase Separation of Superfluids in the Chain of Four-Component Ultracold Atoms
• Ground State Properties of an Asymmetric Hubbard Model for Unbalanced Ultracold Fermionic Quantum Gases