{
  "annotation_id": "1e1f4c56-f6cb-4a2f-b062-46b7d22d9bcc",
  "date_created": "2026-03-02T18:01:45.386000Z",
  "date_modified": "2026-03-02T18:01:45.386000Z",
  "file_hash": "44a349784374c12cce02f97fd0b1910553b779f5e24968f7f3cd57278ef15993",
  "private": false,
  "record": {
    "abstract": "A recent analysis [quant-ph/0104062] suggests that weak measurements can be\nused to give observational meaning to counterfactual reasoning in quantum\nphysics. A weak measurement is predicted to assign a negative unit population\nto a specific state in an interferometric Gedankenexperiment proposed by Hardy.\nWe propose an experimental implementation with trapped ions of the\nGedankenexperiment and of the weak measurement. In our standard quantum\nmechanical analysis of the proposal no states have negative population, but we\nidentify the registration of a negative population by particles being displaced\non average in the direction opposite to a force acting upon them.",
    "arxiv_id": "quant-ph/0109042",
    "authors": [
      "Klaus Molmer"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1016/S0375-9601(01)00783-6",
    "title": "Counterfactual Statements and Weak Measurements: an Experimental   Proposal",
    "url": "https://arxiv.org/abs/quant-ph/0109042"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6ebd6e02-3632-4327-9e44-b8d9320402c1",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}