Counterflow and paired superfluidity in one-dimensional Bose mixtures

ORAL

Abstract

Experimental progress in recent years has made it possible to realize mixtures of cold atoms in optical lattices. In this talk,we present our work on two types of superfluidity in 1D Bose mixtures: the counterflow superfluid and the paired superfluid phase, each of which can coexist with charge-density wave order. We predict and identify these phases both with Luttinger liquid theory and with numerical simulations. Specifically, we show the phase diagram as a function of the filling fraction and the inter-species interaction. We address the question of realizability and detectability of these phases by adding a trap potential, and by calculating various quantities that can be measured in experiment.

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Authors

  • Anzi Hu

    Joint Quantum Institute, University of Maryland and National Institute of Standard and Technology,Gaithersburg, MD 20899

  • Ludwig Mathey

    Joint Quantum Institute, University of Maryland and National Institute of Standard and Technology,Gaithersburg, MD 20899

  • Ippei Danshita

    Department of Physics, Faculty of Science,Tokyo University of Science,Shinjuku-ku,Tokyo 162-8601, Japan

  • Carl Williams

    Joint Quantum Institute, University of Maryland and National Institute of Standard and Technology,Gaithersburg, MD 20899

  • Charles Clark

    Joint Quantum Institute, National Institute of Standards and Technology, Gaithersburg MD 20899, Joint Quantum Institute, National Institute of Standards and Technology, Joint Quantum Institute, University of Maryland and National Institute of Standard and Technology,Gaithersburg, MD 20899, NIST and JQI, NIST