{
  "annotation_id": "32e69daa-b024-4bd6-9d28-08a5094b448a",
  "date_created": "2026-02-17T05:53:12.011000Z",
  "date_modified": "2026-02-17T05:53:12.011000Z",
  "file_hash": "aeb0f7aa3692ca250912ae270dd5a43190324141a39bd5b30f820df79779b7a0",
  "private": false,
  "record": {
    "abstract": "Fault-tolerant modular quantum computing requires stabilizer measurements across the modules in a quantum network. For this, entangled states of high quality and rate must be distributed. Currently, two main types of entanglement distribution protocols exist, namely emission-based and scattering-based, each with its own advantages and drawbacks. On the one hand, scattering-based protocols with cavities or waveguides are fast but demand stringent hardware such as high-efficiency integrated circulators or strong waveguide coupling. On the other hand, emission-based platforms are experimentally feasible but so far rely on Bell-pair fusion with extensive use of slow two-qubit memory gates, limiting thresholds to $\\approx 0.16\\%$. Here, we consider a fully distributed surface code using emission-based entanglement schemes that generate GHZ states in a single shot, i.e., without the need for Bell-pair fusions. We show that our optical setup produces Bell pairs, W states, and GHZ states, enabling both memory-based and optical protocols for distilling high-fidelity GHZ states with significantly improved success rates. Furthermore, we introduce protocols that completely eliminate the need for memory-based two-qubit gates, achieving thresholds of $\\approx 0.19\\%$ with modest hardware enhancements, increasing to above $\\approx 0.24\\%$ with photon-number-resolving detectors. These results show the feasibility of emission-based architectures for scalable fault-tolerant operation.",
    "arxiv_id": "2601.07241",
    "authors": [
      "Siddhant Singh",
      "Rikiya Kashiwagi",
      "Kazufumi Tanji",
      "Wojciech Roga",
      "Daniel Bhatti",
      "Masahiro Takeoka",
      "David Elkouss"
    ],
    "categories": [
      "quant-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "title": "Fault-tolerant modular quantum computing with surface codes using single-shot emission-based hardware",
    "url": "https://arxiv.org/abs/2601.07241",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "36d7b21e-960f-4072-ac54-29ebd317e6b4",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}