{
  "annotation_id": "dfaf5744-68d7-41b5-b589-e213c7df3e9d",
  "date_created": "2026-03-02T18:02:20.751000Z",
  "date_modified": "2026-03-02T18:02:20.751000Z",
  "file_hash": "2d580a30dfa85e495c8acbd3fd568ac1848eaf389581529c1589bb5f0c013ec4",
  "private": false,
  "record": {
    "abstract": "We discuss the problem of implementing generalized measurements (POVMs) with\nlinear optics, either based upon a static linear array or including conditional\ndynamics. In our approach, a given POVM shall be identified as a solution to an\noptimization problem for a chosen cost function. We formulate a general\nprinciple: the implementation is only possible if a linear-optics circuit\nexists for which the quantum mechanical optimum (minimum) is still attainable\nafter dephasing the corresponding quantum states. The general principle enables\nus, for instance, to derive a set of necessary conditions for the linear-optics\nimplementation of the POVM that realizes the quantum mechanically optimal\nunambiguous discrimination of two pure nonorthogonal states. This extends our\nprevious results on projection measurements and the exact discrimination of\northogonal states.",
    "arxiv_id": "quant-ph/0510163",
    "authors": [
      "Peter van Loock",
      "Kae Nemoto",
      "William J. Munro",
      "Philippe Raynal",
      "Norbert L\u00fctkenhaus"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.73.062320",
    "journal_ref": "Phys. Rev. A 73, 062320 (2006)",
    "title": "Implementing Non-Projective Measurements via Linear Optics: an Approach   Based on Optimal Quantum State Discrimination",
    "url": "https://arxiv.org/abs/quant-ph/0510163"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "445fed8d-1519-4f91-8bc8-75125291d2c6",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}