{
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  "path": "/papers/q-2026-06-08-2128/",
  "publishedAt": "2026-06-08T11:49:12.000Z",
  "site": "https://quantum-journal.org",
  "tags": [
    "Paper",
    "https://doi.org/10.22331/q-2026-06-08-2128"
  ],
  "textContent": "Quantum 10, 2128 (2026).\n\nhttps://doi.org/10.22331/q-2026-06-08-2128\n\nEntanglement witnesses (EWs) are a collection of observables that can characterize separable states and, experimentally, estimating EWs can verify entangled states. In this work, we show that a fixed measurement setting on a multipartite entangled state, which we introduce as a network state for the purpose, can estimate EWs. Namely, entangled states can be fully verified in a measurement-based manner, in which experimenters do not necessarily change measurement settings. We present a fixed measurement setting and network states for estimating decomposable EWs, equivalent to the partial transpose criteria. We also consider non-decomposable EWs that detect bound entangled states beyond the partial transpose criteria. The results can be extended to multipartite states such as graph states, a resource for measurement-based quantum computing, and readily applied to distributed settings such as quantum metrology or sensor networks where multipartite entangled states are resourceful.",
  "title": "Detecting Entanglement by State Preparation and Local Measurements"
}