{
  "id": "1902.03220",
  "version": "v1",
  "published": "2019-02-08T18:29:55.000Z",
  "updated": "2019-02-08T18:29:55.000Z",
  "title": "Maltese cross coupling to cold atoms in free space",
  "authors": [
    "Natalia Bruno",
    "Lorena C. Bianchet",
    "Nan Li",
    "Vindhyia Prakash",
    "Natalia Alves",
    "Morgan W. Mitchell"
  ],
  "categories": [
    "physics.atom-ph"
  ],
  "abstract": "We demonstrate a novel geometry for strong coupling of light and matter in free space, i.e., without the use of optical cavities. Guided by optical metrology tools, we use a manual pick-and-place technique to precisely and stably position four high numerical aperture (NA=0.5) aspheric lenses along the four cardinal directions with their foci at a single central point. The geometry immediately doubles the available solid angle and thus the light-atom coupling relative to two-lens schemes, and will enable new trapping, excitation, and collection methods. We test the system by trapping a single 87Rb at the common focus and observing its fluorescence simultaneously from four directions. The fluorescence signals indicate both sub-Poissonian atom number statistics and photon anti-bunching, showing suitability for cold atom quantum optics.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-02-08T18:29:55.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "free space",
      "maltese cross coupling",
      "sub-poissonian atom number statistics",
      "cold atom quantum optics",
      "manual pick-and-place technique"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}