{
  "id": "1602.07523",
  "version": "v1",
  "published": "2016-02-24T14:23:14.000Z",
  "updated": "2016-02-24T14:23:14.000Z",
  "title": "Quantum Hall Effect in Momentum Space",
  "authors": [
    "Tomoki Ozawa",
    "Hannah M. Price",
    "Iacopo Carusotto"
  ],
  "comment": "12 pages, 5 figures",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.quant-gas"
  ],
  "abstract": "We theoretically discuss a momentum-space analogue of the quantum Hall effect, which could be observed in topologically-nontrivial lattice models subject to an external harmonic trapping potential. In our proposal, the Niu-Thouless-Wu formulation of the quantum Hall effect on a torus is realized in the toroidally-shaped Brillouin zone. In this analogy, the position of the trap center in real space controls the magnetic fluxes that are inserted through the holes of the torus in momentum space. We illustrate the momentum-space quantum Hall effect with the non-interacting trapped Harper-Hofstadter model, for which we numerically demonstrate how this effect manifests itself in experimental observables. Extension to the interacting trapped Harper-Hofstadter model is also briefly considered. We finally discuss possible experimental platforms where our proposal for the momentum-space quantum Hall effect could be realised.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-02-24T14:23:14.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "momentum space",
      "momentum-space quantum hall effect",
      "trapped harper-hofstadter model",
      "topologically-nontrivial lattice models subject",
      "real space controls"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2016arXiv160207523O"
    }
  }
}