{
  "id": "2003.02775",
  "version": "v1",
  "published": "2020-03-05T17:18:39.000Z",
  "updated": "2020-03-05T17:18:39.000Z",
  "title": "Suppression of Unwanted $ZZ$ Interactions in a Hybrid Two-Qubit System",
  "authors": [
    "Jaseung Ku",
    "Xuexin Xu",
    "Markus Brink",
    "David C. McKay",
    "Jared B. Hertzberg",
    "Mohammad H. Ansari",
    "B. L. T. Plourde"
  ],
  "comment": "5+15 pages, 5+13 figures",
  "categories": [
    "quant-ph",
    "cond-mat.supr-con"
  ],
  "abstract": "Mitigating crosstalk errors, whether classical or quantum mechanical, is critically important for achieving high-fidelity entangling gates in multi-qubit circuits. For weakly anharmonic superconducting qubits, unwanted $ZZ$ interactions can be suppressed by combining qubits with opposite anharmonicity. We present experimental measurements and theoretical modeling of two-qubit gate error for gates based on the cross resonance interaction between a capacitively shunted flux qubit and a transmon and demonstrate the elimination of the $ZZ$ interaction.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-03-05T17:18:39.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "hybrid two-qubit system",
      "suppression",
      "two-qubit gate error",
      "cross resonance interaction",
      "multi-qubit circuits"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}