{
  "id": "2004.02905",
  "version": "v1",
  "published": "2020-04-06T18:00:11.000Z",
  "updated": "2020-04-06T18:00:11.000Z",
  "title": "Signatures of quantum phase transitions after quenches in quantum chaotic one-dimensional systems",
  "authors": [
    "Asmi Haldar",
    "Krishnanand Mallayya",
    "Markus Heyl",
    "Frank Pollmann",
    "Marcos Rigol",
    "Arnab Das"
  ],
  "categories": [
    "cond-mat.stat-mech",
    "cond-mat.str-el"
  ],
  "abstract": "Quantum phase transitions are central for the understanding of the equilibrium low-temperature properties of quantum matter. Locating them can be challenging both by means of theoretical techniques as well as for experiments. Here, we show that the antithetic strategy of forcing a system strongly out of equilibrium can provide a route to identify signatures of quantum phase transitions. By quenching a quantum chaotic (nonintegrable) spin chain, we find that local observables can exhibit distinct features in their intermediate-time dynamics, when the quench parameter is close to its critical value, where the ground state undergoes a quantum phase transition. We find that the effective temperature in the expected thermal-like states after equilibration exhibits a minimum in the vicinity of the quantum critical value of the quench parameter, correlating with the features in the real-time dynamics of observables. We also explore dynamical nonequilibrium signatures of a quantum critical point in a model with a topological transition, and discuss how to access our results experimentally in systems of Rydberg atoms.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-04-06T18:00:11.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum phase transition",
      "quantum chaotic one-dimensional systems",
      "signatures",
      "quench parameter",
      "ground state undergoes"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}