{
  "id": "2102.05686",
  "version": "v1",
  "published": "2021-02-10T19:01:04.000Z",
  "updated": "2021-02-10T19:01:04.000Z",
  "title": "Quantum-critical dynamics of a Josephson junction at the topological transition",
  "authors": [
    "Vladislav D. Kurilovich",
    "Chaitanya Murthy",
    "Pavel D. Kurilovich",
    "Bernard van Heck",
    "Leonid I. Glazman",
    "Chetan Nayak"
  ],
  "comment": "27 pages, 7 figures",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.supr-con"
  ],
  "abstract": "We find the admittance $Y(\\omega)$ of a Josephson junction at or near a topological transition. The dependence of the admittance on frequency and temperature at the critical point is universal and determined by the symmetries of the system. Despite the absence of a spectral gap at the transition, the dissipative response may remain weak at low energies: $\\mathrm{Re}\\,Y(\\omega)\\propto \\max (\\omega, T)^2$. This behavior is strikingly different from the electromagnetic response of a normal metal. Away from the critical point, the scaling functions for the dependence of the admittance on frequency and temperature are controlled by at most two parameters.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-02-10T19:01:04.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "josephson junction",
      "topological transition",
      "quantum-critical dynamics",
      "admittance",
      "critical point"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 27,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}