{
  "annotation_id": "c5657f1b-a6d7-4ac2-93d5-880bf3f60834",
  "date_created": "2026-03-02T18:01:42.418000Z",
  "date_modified": "2026-03-02T18:01:42.418000Z",
  "file_hash": "73e9388eb5c1ffefd7023e380d555c92281abe6332f698fe6d536ec28e7f92d0",
  "private": false,
  "record": {
    "abstract": "Real quantum systems couple to their environment and lose their intrinsic\nquantum nature through the process known as decoherence. Here we present a\nmethod for minimizing decoherence by making it energetically unfavorable. We\npresent a Hamiltonian made up solely of two-body interactions between four\ntwo-level systems (qubits) which has a two-fold degenerate ground state. This\ndegenerate ground state has the property that any decoherence process acting on\nan individual physical qubit must supply energy from the bath to the system.\nQuantum information can be encoded into the degeneracy of the ground state and\nsuch coherence-preserving qubits will then be robust to local decoherence at\nlow bath temperatures. We show how this quantum information can be universally\nmanipulated and indicate how this approach may be applied to a quantum dot\nquantum computer.",
    "arxiv_id": "quant-ph/0012018",
    "authors": [
      "D. Bacon",
      "K. R. Brown",
      "K. B. Whaley"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.87.247902",
    "journal_ref": "Phys. Rev. Lett. Vol 87 (24), 247902 (2001)",
    "title": "Coherence-Preserving Quantum Bits",
    "url": "https://arxiv.org/abs/quant-ph/0012018"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c28e2114-bab3-4a03-aecc-17fbe4d4b05d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}