Paper Citation Record · LEDGER

Studying fundamental limit of optical fiber links to $10^{-21}$ level

As of 4 August 2026, this Paper Citation Record lists 39 of 39 outbound references and 1 inbound Pith citation observation for arXiv:1907.11399.

A citation records a reference. It does not transfer a finding from one paper to another.

pith.paper-citation-record.v1
1907.11399 v1

Coverage vector

measured 39 of 39 reference resolution

Typed states for the displayed outbound observations.

Source: paper_references, paper_reference_links, observed 2026-05-24T16:06:06.010375Z

measured 40 of 40 standing notices

One-hop event checks from named stored sources.

Source: scholarly_work_events, retraction_status_cache, observed 2026-08-04T06:34:03.388597+00:00

measured 1 of 1 inbound itemization

Pith citing papers itemized under the disclosed page cap.

Source: paper_references, paper_reference_links, observed 2026-05-24T16:06:06.010375Z

measured 0 of 1 external citation measurements

A source-named dated measurement, never combined with another source.

Source: pith, observed 2026-05-24T16:06:15.301858Z

Reference resolution

39 of 39 outbound references displayed

verified exact1
verified fuzzy35
unresolved1
parse uncertain0
malformed identifier1
metadata mismatch1

External citation measurements

No source-named external measurement is stored.

Outbound references

Observation e59f06be-e711-4f34-ad90-ad0d0823e717 · outbound

This paper cites Coherent transfer of an optical carrier over 251km.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Coherent transfer of an optical carrier over 251km

Reference 1

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.597331Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 36f7b921-ffed-4079-975b-4d4efa7005ef · outbound

This paper cites Remote transfer of ultrastable frequency references via ﬁber networks.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Remote transfer of ultrastable frequency references via ﬁber networks

Reference 2

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.707941Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 38187ff8-f3d3-42e4-b220-07c36ea5534b · outbound

This paper cites Systematic evaluation of an atomic clock at2× 10−18 total uncertainty.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Systematic evaluation of an atomic clock at2× 10−18 total uncertainty

Reference 3

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.619745Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 7ca7c5f0-bb5a-4acf-ab35-5f9c230d39ce · outbound

This paper cites Single-IonAtomicClockwith 3× 10−18 Systematic Uncertainty.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Single-IonAtomicClockwith 3× 10−18 Systematic Uncertainty

Reference 4

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.648096Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 6d420703-58bb-452c-898f-8300ffecc8c9 · outbound

This paper cites Cryogenic optical lattice clocks.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Cryogenic optical lattice clocks

Reference 5

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.562899Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation e6ffba4d-66ec-4d43-8ddb-37588abc1d6e · outbound

This paper cites Ultra-stable optical clock with two cold-atom ensembles.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Ultra-stable optical clock with two cold-atom ensembles

Reference 6

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.604583Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation cd1480ac-881c-4384-9045-0e27b8851eb1 · outbound

This paper cites A strontium lattice clock with3× 10−17 inaccuracy and its frequency.

Studying fundamental limit of optical fiber links to $10^{-21}$ level A strontium lattice clock with3× 10−17 inaccuracy and its frequency

Reference 7

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.613113Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 10a58675-c4df-409d-8ff6-c76a34c6d87e · outbound

This paper cites Frequency ratio of Yb and Sr clocks with5× 10−17 uncertainty at 150 seconds averaging time.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Frequency ratio of Yb and Sr clocks with5× 10−17 uncertainty at 150 seconds averaging time

Reference 8

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.596772Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 3ee02ddd-4271-43be-9159-958384cb3ca1 · outbound

This paper cites Towards a redeﬁnition of the second based on optical atomic clocks.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Towards a redeﬁnition of the second based on optical atomic clocks

Reference 9

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.698904Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 41182723-b587-4c72-9da2-0caf8c8a5f00 · outbound

This paper cites Brillouin ampliﬁcation supports1× 10−20 accuracy in optical frequency transfer over 1400 km of underground ﬁbres.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Brillouin ampliﬁcation supports1× 10−20 accuracy in optical frequency transfer over 1400 km of underground ﬁbres

Reference 10

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.589268Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation b5ce4bb9-e848-4a27-aeee-1fd84597d7b3 · outbound

This paper cites Studying fundamental limit of optical fiber links to $10^{-21}$ level.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Studying fundamental limit of optical fiber links to $10^{-21}$ level

Reference 11

Resolution: metadata mismatch; local_arxiv, observed 2026-05-24T16:06:15.305275Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 9f0df01c-d560-4e05-8085-5873afcd6f49 · outbound

This paper cites Optical- Frequency Transfer over a Single-Span 1840 km Fiber Link.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Optical- Frequency Transfer over a Single-Span 1840 km Fiber Link

Reference 12

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.685185Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 88242588-984f-41b2-8b75-6532b1cc5bd9 · outbound

This paper cites Delivering the same optical frequency at two places: accurate cancellation of phase noise introduced by an optical ﬁber or other time-varying path.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Delivering the same optical frequency at two places: accurate cancellation of phase noise introduced by an optical ﬁber or other time-varying path

Reference 13

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.693546Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 35c7c7cd-665c-4cbc-ad02-78aa267c274b · outbound

This paper cites Frequency transfer via a two-way optical phase comparison on a multiplexed ﬁber network.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Frequency transfer via a two-way optical phase comparison on a multiplexed ﬁber network

Reference 14

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.566715Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 6e4c8196-1f1a-4e8a-8eba-6b8df768c418 · outbound

This paper cites Cascaded multiplexed optical link on a telecommunication network for frequency dissemination.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Cascaded multiplexed optical link on a telecommunication network for frequency dissemination

Reference 15

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.673276Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation b2dbab02-a3d7-49d7-a844-83ee51c04b07 · outbound

This paper cites Two-way optical frequency comparison over 100 km telecommunication network ﬁbers.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Two-way optical frequency comparison over 100 km telecommunication network ﬁbers

Reference 16

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.631552Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 22e6efcb-1dac-4da9-9acf-d2be50d44e17 · outbound

This paper cites Tackling the limits of optical ﬁber links.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Tackling the limits of optical ﬁber links

Reference 17

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.623284Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation c8a89ab0-6291-4361-9b01-e6237474231c · outbound

This paper cites Hybrid ﬁber link for accurate optical frequency comparisons.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Hybrid ﬁber link for accurate optical frequency comparisons

Reference 18

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.645834Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 6e511c58-ebf5-425f-9aa7-788454b13a8a · outbound

This paper cites Geodesy and metrology with a transportable optical clock.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Geodesy and metrology with a transportable optical clock

Reference 19

Resolution: verified exact; local_arxiv, observed 2026-05-24T16:06:15.298537Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 119ee624-8ae5-4dcb-a849-d71be4426df6 · outbound

This paper cites Eﬀect of a timebase mismatch in two-way optical frequency transfer.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Eﬀect of a timebase mismatch in two-way optical frequency transfer

Reference 20

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.617917Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 2571a2d2-1df9-4261-bded-6c54453d9990 · outbound

This paper cites Test of special relativity using a ﬁber network of optical clocks.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Test of special relativity using a ﬁber network of optical clocks

Reference 21

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.677274Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation bfb2bf96-75d7-4edc-bd45-af4a0f19bbeb · outbound

This paper cites Quantum cascade laser frequency stabilization at the sub-Hz level.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Quantum cascade laser frequency stabilization at the sub-Hz level

Reference 22

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.616535Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 18e4d1de-7050-43d5-a03f-ef07706946aa · outbound

This paper cites High-stabilitytransferofanopticalfrequencyoverlongﬁber-optic links.

Studying fundamental limit of optical fiber links to $10^{-21}$ level High-stabilitytransferofanopticalfrequencyoverlongﬁber-optic links

Reference 23

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.680974Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 8cf41d5f-ecc6-431f-8136-ee97c2f2ac7b · outbound

This paper cites Time and frequency transfer in modern DWDM telecommunication networks.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Time and frequency transfer in modern DWDM telecommunication networks

Reference 24

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.669447Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 6a7678b0-c541-44bf-8a01-cf2291698db4 · outbound

This paper cites Considerations on the measurement of the stability of oscillators with frequency counters.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Considerations on the measurement of the stability of oscillators with frequency counters

Reference 25

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.703007Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 0cee0a7e-bb46-4cf5-b885-02203ae62ef6 · outbound

This paper cites The uncertainty associated with the weighted mean frequency of a phase-stabilized signal with white phase noise.

Studying fundamental limit of optical fiber links to $10^{-21}$ level The uncertainty associated with the weighted mean frequency of a phase-stabilized signal with white phase noise

Reference 26

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.659008Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation c74e2bc2-daec-4bdf-9f92-e597b114c140 · outbound

This paper cites On the relation between uncertainties of weighted frequency averages and the various types of Allan deviations.

Studying fundamental limit of optical fiber links to $10^{-21}$ level On the relation between uncertainties of weighted frequency averages and the various types of Allan deviations

Reference 27

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.581290Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 42fce967-8558-43ab-82ed-1f0b53100029 · outbound

This paper cites An Eﬃcient and Conﬁgurable Preprocessing Algorithm to Improve Stability Analysis.

Studying fundamental limit of optical fiber links to $10^{-21}$ level An Eﬃcient and Conﬁgurable Preprocessing Algorithm to Improve Stability Analysis

Reference 28

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.600376Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation a208e37d-de6e-4dbf-9898-313df6c969ec · outbound

This paper cites GPS Time and Frequency Transfer: PPP and Phase-Only Analysis.

Studying fundamental limit of optical fiber links to $10^{-21}$ level GPS Time and Frequency Transfer: PPP and Phase-Only Analysis

Reference 29

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.622213Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 2e9fa916-5539-4dc8-b76f-7cf48e72f2b5 · outbound

This paper cites Optical frequency transfer via a 660 km underground ﬁber link using a remote Brillouin ampliﬁer.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Optical frequency transfer via a 660 km underground ﬁber link using a remote Brillouin ampliﬁer

Reference 30

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.660848Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation d05b5118-b877-462f-b53f-4b2be533769f · outbound

This paper cites Optical frequency transfer - a European network.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Optical frequency transfer - a European network

Reference 31

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.636599Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation be17572c-408e-4265-9348-ce046c5a7e3e · outbound

This paper cites classical.

Studying fundamental limit of optical fiber links to $10^{-21}$ level classical

Reference 32

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.593178Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 0316868c-43cd-4519-9079-d0a5fb05409f · outbound

This paper cites The two ﬁbers, denoted by F1 and F2, are a pair of urban ﬁbers of 43 km connecting two laboratories, SYRTE and LPL.

Studying fundamental limit of optical fiber links to $10^{-21}$ level The two ﬁbers, denoted by F1 and F2, are a pair of urban ﬁbers of 43 km connecting two laboratories, SYRTE and LPL

Reference 33

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.665472Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation db2fb500-b40d-4b7e-b959-419cd48e71f5 · outbound

This paper cites On PD1, one records the beat note between the laser beam reﬂected by FM labeled A and by p-FM labeled D, shown in Fig.1 as green ﬁlled circles.

Studying fundamental limit of optical fiber links to $10^{-21}$ level On PD1, one records the beat note between the laser beam reﬂected by FM labeled A and by p-FM labeled D, shown in Fig.1 as green ﬁlled circles

Reference 34

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.652449Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 8d621d31-e480-4422-92ec-c4f4d7143aa5 · outbound

This paper cites an unresolved cited work.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Unresolved cited work

Reference 35

Resolution: unresolved; raw_fallback, observed 2026-05-24T16:06:15.689543Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 1ed0c15e-8e78-4090-871a-c49d96967c63 · outbound

This paper cites Phase evolution and Fourier analysis InordertoprovideabetterinsightofthediﬀerencesbetweentheseTWBsandTWNFobservables, we present their phase evolution in Fig.4(a).

Studying fundamental limit of optical fiber links to $10^{-21}$ level Phase evolution and Fourier analysis InordertoprovideabetterinsightofthediﬀerencesbetweentheseTWBsandTWNFobservables, we present their phase evolution in Fig.4(a)

Reference 36

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.635598Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation a9b46d90-fd79-4b18-8dab-dbceaa729201 · outbound

This paper cites an unresolved cited work.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Unresolved cited work

Reference 37

Resolution: malformed identifier; raw_fallback, observed 2026-05-24T16:06:15.580934Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation 32b462da-b9c0-4785-ad9f-296d1df8c1c0 · outbound

This paper cites Accuracy and reciprocity We evaluate the accuracy of the frequency comparison of the hybrid setup.

Studying fundamental limit of optical fiber links to $10^{-21}$ level Accuracy and reciprocity We evaluate the accuracy of the frequency comparison of the hybrid setup

Reference 38

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.644188Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Observation a97e6f9e-13fa-4edf-879f-168296ee3d5e · outbound

This paper cites optical ﬁber links chain.

Studying fundamental limit of optical fiber links to $10^{-21}$ level optical ﬁber links chain

Reference 39

Resolution: verified fuzzy; raw_fallback, observed 2026-05-24T16:06:15.662972Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.

Pith citing papers

Observation b5ce4bb9-e848-4a27-aeee-1fd84597d7b3 · inbound