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