{
  "annotation_id": "d8331b44-41a8-48df-862d-9c031d4ac023",
  "date_created": "2026-03-02T18:02:31.041000Z",
  "date_modified": "2026-03-02T18:02:31.041000Z",
  "file_hash": "a4fd7634e69a5f4ab5fef59c46403e73389730e5a93120efd16138c9f43c4ac3",
  "private": false,
  "record": {
    "abstract": "We show that the phenomenon of superadditivity of distillable entanglement\nobserved in multipartite quantum systems results from the consideration of\nstates created during the execution of the standard end-to-end quantum\nteleportation protocol (and a few additional local operations and classical\ncommunication (LOCC) steps) on a linear chain of singlets. Some of these\nintermediate states are tensor products of bound-entangled (BE) states, and\nhence, by construction possess distillable entanglement, which can be unlocked\nby simply completing the rest of the LOCC operations required by the underlying\nteleportation protocol. We use this systematic approach to construct both new\nand known examples of superactivation of bound entanglement, and first examples\nof activation of BE states using other BE states. A surprising outcome is the\nconstruction of noiseless quantum relay channels with no distillable\nentanglement between any two parties, except for that between the two end\nnodes.",
    "arxiv_id": "quant-ph/0611081",
    "authors": [
      "Somshubhro Bandyopadhyay",
      "Vwani Roychowdhury"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.72.060303",
    "journal_ref": "Phys. Rev. A 72, 060303(R) (2005)",
    "title": "Superadditivity of distillable entanglement From Quantum Teleportation",
    "url": "https://arxiv.org/abs/quant-ph/0611081"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9daffcd3-5a7b-4165-a3bd-3bb07bc1bace",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}