{
  "id": "1807.10270",
  "version": "v1",
  "published": "2018-07-26T17:57:56.000Z",
  "updated": "2018-07-26T17:57:56.000Z",
  "title": "Unveiling the limits in the coherence of spin qubits against magnetic noise",
  "authors": [
    "L. Escalera-Moreno",
    "A. Gaita-Ariño",
    "E. Coronado"
  ],
  "categories": [
    "cond-mat.mes-hall",
    "quant-ph"
  ],
  "abstract": "The realization of spin-based logical gates crucially depends on magnetically-coupled spin qubits. Thus, understanding decoherence when spin qubits are in close proximity will become a roadblock to overcome. Herein, we provide a general first-principles model that straightforwardly evaluates the spin bath effect on the qubit phase memory time $T_m$ . The method is applied to a ground-spin $J=8$ magnetic molecule 1 displaying atomic clock transitions, which remarkably increase $T_m$ at unusually high spin concentrations. Besides reproducing experimental $T_m$ values calculated by recent models in simple spin-1/2 systems, our approach unveils the causes that limit the coherence reached at the clock transitions in more challenging systems such as 1, where these previous models fail.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-07-26T17:57:56.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "spin qubits",
      "magnetic noise",
      "qubit phase memory time",
      "general first-principles model",
      "displaying atomic clock transitions"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}