Pith Number

pith:YA3DPUB7

pith:2026:YA3DPUB7EFMP23Y4RDB5C5BGS2

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Robust High-Precision Time Transfer over 91-km Hollow-Core Fiber: Immunity to Dispersion and Nonlinearity

Bo Liu, Huibo Hong, Jiang Chen, Qian Zhou, Rongduo Lu, Ruifang Dong, Ru Yuan, Shougang Zhang, Tao Liu, Xiang Zhang, Xinxing Guo

Hollow-core fiber supports high-precision time transfer over 91 km with time deviations below 80 ps by minimizing dispersion and nonlinearity effects.

arxiv:2605.13272 v1 · 2026-05-13 · physics.optics

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\pithnumber{YA3DPUB7EFMP23Y4RDB5C5BGS2}

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Claims

C1strongest claim

Over the 91 km link, the HCF yields a signal-to-noise ratio (SNR) enhancement of more than 24 dB and confines the time deviation to less than 80 ps, which is nearly an order-of-magnitude improvement over SMF, where the time deviation exceeds 600 ps, while remaining nearly immune to power and wavelength fluctuations.

C2weakest assumption

The bidirectional time transfer platform provides equivalent non-reciprocal error sources and environmental exposure for both fiber types, with no unaccounted setup-specific biases affecting the HCF versus SMF comparison.

C3one line summary

Hollow-core fiber achieves time transfer stability of 0.2 ps at 1000 s over 91 km with time deviation under 80 ps, showing immunity to dispersion and nonlinearity compared to single-mode fiber.

References

30 extracted · 30 resolved · 0 Pith anchors

[1] State-of-the-Art Review: Electronic Warfare Against Radar Systems, 2025 · doi:10.1109/access.2025.3555493

[2] Radiometric Interferometry for Deep Space Navigation Using Geostationary Satellites, 2025 · doi:10.3390/aerospace12110982

[3] Simultaneous multi-spacecraft observations with VLBI radio telescopes to study the interplanetary phase scintillation, 2025 · doi:10.1007/s10686-025-09989-5

[4] On the improvement of the sensitivity levels of VLBI solutions from a combination with GNSS, 2023 · doi:10.1016/j.asr.2023.06.021

[5] Quantum Two-Way Time Transfer Over a 103-km Urban Fiber Link 2024 · doi:10.1109/jlt.2023.3323434

Receipt and verification

First computed	2026-05-18T02:44:49.267107Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c03637d03f2158fd6f1c88c3d1742696889d6c681f8b0b573e83f3bb212065e2

Aliases

arxiv: 2605.13272 · arxiv_version: 2605.13272v1 · doi: 10.48550/arxiv.2605.13272 · pith_short_12: YA3DPUB7EFMP · pith_short_16: YA3DPUB7EFMP23Y4 · pith_short_8: YA3DPUB7

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/YA3DPUB7EFMP23Y4RDB5C5BGS2 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: c03637d03f2158fd6f1c88c3d1742696889d6c681f8b0b573e83f3bb212065e2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4e9d31e171d209a410a2a7e3e2d76ac775855a1f8189207eeb682f67ee2cf81",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2026-05-13T09:49:26Z",
    "title_canon_sha256": "deea797ecd4db530e2f71669a5816d8feff08b00be9161cff68556259d5ddfc1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.13272",
    "kind": "arxiv",
    "version": 1
  }
}