{
  "annotation_id": "7add529b-1f81-4f8c-b270-28293644c891",
  "date_created": "2026-03-02T18:01:56.336000Z",
  "date_modified": "2026-03-02T18:01:56.336000Z",
  "file_hash": "807024e6e33cd9551f5265b215d7a5adf6063d4f791bbd8c9a963b6cfa0b9d5a",
  "private": false,
  "record": {
    "abstract": "Arbitrary quantum states cannot be copied. In fact, to make a copy we must\nprovide complete information about the system. However, can a quantum system\nself-replicate? This is not answered by the no-cloning theorem. In the\nclassical context, Von Neumann showed that a `universal constructor\u0027 can exist\nwhich can self-replicate an arbitrary system, provided that it had access to\ninstructions for making copy of the system. We question the existence of a\nuniversal constructor that may allow for the self-replication of an arbitrary\nquantum system. We prove that there is no deterministic universal quantum\nconstructor which can operate with finite resources. Further, we delineate\nconditions under which such a universal constructor can be designed to operate\ndterministically and probabilistically.",
    "arxiv_id": "quant-ph/0303124",
    "authors": [
      "Arun K. Pati",
      "Samuel L. Braunstein"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Quantum mechanical Universal constructor",
    "url": "https://arxiv.org/abs/quant-ph/0303124"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "abd245d4-64ec-4d99-8cc1-74dac4a595a3",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}