Enhanced repulsively bound atom pairs in topological optical lattice ladders

Flannigan, Stuart and Daley, Andrew J (2020) Enhanced repulsively bound atom pairs in topological optical lattice ladders. Quantum Science and Technology, 5 (4). 045017. (https://doi.org/10.1088/2058-9565/abb028)

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Abstract

There is a growing interest in using cold-atom systems to explore the effects of strong interactions in topological band structures. Here we investigate interacting bosons in a Cruetz ladder, which is characterised by topological flat energy bands where it has been proposed that interactions can lead to the formation of bound atomic pairs giving rise to pair superfluidity. By investigating realistic experimental implementations, we understand how the lattice topology enhances the properties of bound pairs giving rise to relatively large effective pair-tunnelling in these systems which can lead to robust pair superfluidity, and we find lattice supersolid phases involving only pairs. We identify schemes for preparation of these phases via time-dependent parameter variation and look at ways to detect and characterise these systems in a lattice. This work provides a starting point for investigating the interplay between the effects of topology, interactions and pairing in more general systems, with potential future connections to quantum simulation of topological materials.

ORCID iDs

Flannigan, Stuart and Daley, Andrew J ORCID logoORCID: https://orcid.org/0000-0001-9005-7761;
  • Item type:Article
    ID code:73761
    Dates:
    Date
    Event
    3 September 2020
    Published
    18 August 2020
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:07 Sep 2020 13:50
    Last modified:11 Nov 2024 12:43
    URI:https://strathprints.strath.ac.uk/id/eprint/73761
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