{
  "annotation_id": "2c301a90-4f74-4c63-b7fd-d983e7383e1a",
  "date_created": "2026-03-02T18:02:30.810000Z",
  "date_modified": "2026-03-02T18:02:30.810000Z",
  "file_hash": "840b710c331f06b7bf4ce98e07eca827147232290d18330cec1183f443b16f8f",
  "private": false,
  "record": {
    "abstract": "A nuclear spin can act as a quantum switch that turns on or off ultracold\ncollisions between atoms even when there is neither interaction between nuclear\nspins nor between the nuclear and electron spins. This \"exchange blockade\" is a\nnew mechanism for implementing quantum logic gates that arises from the\nsymmetry of composite identical particles, rather than direct coupling between\nqubits. We study the implementation of the entangling $\\sqrt{\\text{SWAP}}$ gate\nbased on this mechanism for a model system of two atoms with ground electron\nconfiguration $^1S_0$, spin 1/2 nuclei, trapped in optical tweezers. We\nevaluate a proof-of-principle protocol based on adiabatic evolution of a one\ndimensional double Gaussian well, calculating fidelities of operation as a\nfunction of interaction strength, gate time, and temperature.",
    "arxiv_id": "quant-ph/0609111",
    "authors": [
      "David Hayes",
      "Paul Julienne",
      "Ivan Deutsch"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.98.070501",
    "title": "Quantum logic via the exchange blockade in ultracold collisions",
    "url": "https://arxiv.org/abs/quant-ph/0609111"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "008625f0-df1d-4a48-8064-6e949e2741c4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}