{
  "annotation_id": "cf4f454b-40b3-45c5-b8f3-6cdd62e4b3d7",
  "date_created": "2026-03-02T18:02:00.224000Z",
  "date_modified": "2026-03-02T18:02:00.224000Z",
  "file_hash": "41edfe4443e9ccf6b350404a365cedf3ec2adda691d6c526b6b699ee68b989ad",
  "private": false,
  "record": {
    "abstract": "We analyze the quantum walk on a cycle using discrete Wigner functions as a\nway to represent the states and the evolution of the walker. The method\nprovides some insight on the nature of the interference effects that make\nquantum and classical walks different. We also study the behavior of the system\nwhen the quantum coin carried by the walker interacts with an environment. We\nshow that for this system quantum coherence is robust for initially delocalized\nstates of the walker. The use of phase-space representation enables us to\ndevelop an intuitive description of the nature of the decoherence process in\nthis system.",
    "arxiv_id": "quant-ph/0308104",
    "authors": [
      "C. C. Lopez",
      "J. P. Paz"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.052305",
    "journal_ref": "Phys. Rev. A 68, 052305 (2003)",
    "title": "Phase-space approach to the study of decoherence in quantum walks",
    "url": "https://arxiv.org/abs/quant-ph/0308104"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "fe72354b-0794-4ced-9e3e-67b09769e198",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}