{
  "id": "1903.10639",
  "version": "v1",
  "published": "2019-03-26T00:14:39.000Z",
  "updated": "2019-03-26T00:14:39.000Z",
  "title": "Asymmetric quantum shot noise in magnon transport",
  "authors": [
    "Kouki Nakata",
    "Yuichi Ohnuma",
    "Mamoru Matsuo"
  ],
  "comment": "8 pages, 2 figures, accepted for publication in Phys. Rev. B: Measurement of a magnon current noise in an insulating magnet has been reported in arXiv:1810.01500 [S. Rumyantsev et al., Appl. Phys. Lett. 114, 090601 (2019)]",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci",
    "cond-mat.quant-gas",
    "cond-mat.stat-mech"
  ],
  "abstract": "We study a frequency-dependent noise-to-current ratio for asymmetric, symmetric, and noncommutative current-noise in a ferromagnetic insulating junction, and extract quantum-mechanical properties of magnon transport at low temperatures. We demonstrate that the noncommutative noise, vanished in the dc-limit (i.e., a classical regime), increases monotonically as a function of frequency, and show that the noncommutative noise associated directly with quantum fluctuations of magnon currents breaks through the classical upper limit determined by the symmetric noise and realizes asymmetric quantum shot noise. Finally, we show that our theoretical predictions are within experimental reach with current device and measurement scheme while exploiting low temperatures. Our work provides a platform toward experimental access to quantum fluctuations of magnon currents.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-03-26T00:14:39.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "magnon transport",
      "realizes asymmetric quantum shot noise",
      "low temperatures",
      "quantum fluctuations",
      "frequency-dependent noise-to-current ratio"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}