Spin-gap spectroscopy in a bosonic flux ladder
Abstract
Ultracold bosonic atoms trapped in a two-leg ladder pierced by a magnetic field provide a minimal and quasi-one-dimensional instance to study the interplay between orbital magnetism and interactions. Using time-dependent matrix-product-states simulations, we investigate the properties of the so-called "Meissner" and "vortex" phases which appear in such system, focusing on experimentally accessible observables. We discuss how to experimentally monitor the phase transition, and show that the response to a modulation of the density imbalance between the two legs of the ladder is qualitatively different in the two phases. We argue that this technique can be used as a tool for many-body spectroscopy, allowing to quantitatively measure the spin gap in the Meissner phase. We finally discuss its experimental implementation
Cite
@article{arxiv.1708.02832,
title = {Spin-gap spectroscopy in a bosonic flux ladder},
author = {Marcello Calvanese Strinati and Fabrice Gerbier and Leonardo Mazza},
journal= {arXiv preprint arXiv:1708.02832},
year = {2018}
}
Comments
23 pages, 11 figures. Updated version after publication in New J. Phys