{
  "id": "1206.2538",
  "version": "v1",
  "published": "2012-06-12T14:15:35.000Z",
  "updated": "2012-06-12T14:15:35.000Z",
  "title": "Deterministic generation of N00N states using quantum dots in a cavity",
  "authors": [
    "Michael N. Leuenberger",
    "Mikhail Erementchouk"
  ],
  "comment": "6 pages, 6 figures, RevTex",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Compared to classical light sources, quantum sources based on N00N states consisting of $N$ photons achieve an $N$-times higher phase sensitivity, giving rise to super-resolution. N00N-state creation schemes based on linear optics and projective measurements only have a success probability $p$ that decreases exponentially with $N$, e.g. $p=4.4\\times 10^{-14}$ for N=20. Feed-forward improves the scaling but $N$ fluctuates nondeterministically in each attempt. Schemes based on parametric down-conversion suffer from low production efficiency and low fidelity. A recent scheme based on atoms in a cavity combines deterministic time evolution, local unitary operations, and projective measurements. Here we propose a novel scheme based on the off-resonant interaction of $N$ photons with four semiconductor quantum dots (QDs) in a cavity to create N00N states deterministically with $p=1$ and fidelity above 90% for $N\\lesssim 60$, without the need of any projective measurement or local unitary operation. Using our measure we obtain maximum $N$-photon entanglement $E_N=1$ for arbitrary $N$. Our method paves the way to the miniaturization of N00N-state sources to the nanoscale regime, with the possibility to integrate them on a computer chip based on semiconductor materials.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-06-12T14:15:35.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "deterministic generation",
      "local unitary operation",
      "projective measurement",
      "times higher phase sensitivity",
      "parametric down-conversion suffer"
    ],
    "note": {
      "typesetting": "RevTeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012arXiv1206.2538L"
    }
  }
}