{
  "annotation_id": "a47707a6-76bc-4d7e-a4b4-4d24aa39fd97",
  "date_created": "2026-03-02T18:01:52.426000Z",
  "date_modified": "2026-03-02T18:01:52.426000Z",
  "file_hash": "63283dda27defdd356b67810ba44706c69b244758ecb5c852e73e07d44068487",
  "private": false,
  "record": {
    "abstract": "Due to the anisotropy of quantum lossy channels one must choose optimal bases\nof input states for best estimating them. In this paper, we obtain that the\nequal probability Schr\\\"{o}dinger cat states are optimal for estimating a\nsingle lossy channel and they are also the optimal bases of input states for\nestimating composite lossy channels. On the other hand, by using the symmetric\nlogarithmic derivative (SLD) Fisher information of output states exported from\nthe lossy channels we obtain that if we take the equal probability\nSchr\\\"{o}dinger cat states as the bases of input states the maximally entangled\ninputs are not optimal, however if the bases of the input states are not the\nequal probability Schr\\\"{o}dinger cat states the maximally entangled input\nstates may be optimal for the estimating composite lossy channel.",
    "arxiv_id": "quant-ph/0205121",
    "authors": [
      "Xian-Ting Liang"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Strategies for Estimating Quantum Lossy Channels",
    "url": "https://arxiv.org/abs/quant-ph/0205121"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b7194e6f-77cb-46dd-a4e4-bf8ce1ff02b9",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}