Counterflow and paired superfluidity in one-dimensional Bose mixtures

ORAL

Abstract

We study the quantum phases of 1D Bose mixtures using Luttinger liquid theory and the numerical method,TEBD. We consider a binary mixture with both repulsive and attractive inter-species interaction. We first present the phase diagram for a homogeneous system. In particular, we study the paired superfluid(PSF) and counterflow superfluid(CFSF) phases at different filling and hopping energies,as well as parameter regions where PSF/CFSF coexist with charge density wave (CDW) order.Then we address the question of how these phases can be created and detected in the presence of a trap. We present measurable quantities, such as time-of-flight images and noise correlations. We also suggest applying a Feshbach ramp and $\pi$/2 pulse followed by Bragg spectroscopy as possible ways of detection.

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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
    • Joint Quantum Institute

  • Ippei Danshita

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

  • Carl Williams

    • NIST
    • Joint Quantum Institute (UMd and NIST)
    • Joint Quantum Institute, University of Maryland and National Institute of Standard and Technology, Gaithersburg, MD 20899

  • Charles Clark

    • JQI, NIST and University of Maryland
    • Joint Quantum Institute, National Institute of Standards and Technology, Gaithersburg MD 20899
    • Joint Quantum Institute, National Institute of Standards and Technology and the University of Maryland, Gaithersburg, Maryland 20899-8410, USA
    • NIST
    • Joint Quantum Institute, University of Maryland and National Institute of Standard and Technology, Gaithersburg, MD 20899