{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:EOXEEZIZACQ35GJENO6DU6OWQW","short_pith_number":"pith:EOXEEZIZ","schema_version":"1.0","canonical_sha256":"23ae42651900a1be99246bbc3a79d685a35f5d8ac34a1ebaaea0615262e92be2","source":{"kind":"arxiv","id":"2601.22084","version":1},"attestation_state":"computed","paper":{"title":"Probing the Sound Speed of Dark Energy with a Lunar Laser Interferometer","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Alfredo Gurrola, Oem Trivedi, Robert J. Scherrer","submitted_at":"2026-01-29T18:23:38Z","abstract_excerpt":"The sound speed of dark energy encodes fundamental information about the microphysics underlying cosmic acceleration, yet remains essentially unconstrained by existing observations. We demonstrate that a lunar-based laser interferometer, such as the proposed Laser Interferometer Lunar Antenna (LILA), can directly probe the sound speed of dark energy by measuring the real-time evolution of horizon-scale gravitational potentials. Operating in the ultra-low-frequency gravitational band inaccessible from Earth, LILA is sensitive to scalar metric perturbations sourced by dark energy dynamics. Using"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2601.22084","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-01-29T18:23:38Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"ed74609c22e0fe3e442e1f97b42f3a9acb7361b153ad7af95b4dd87e90c16556","abstract_canon_sha256":"f87d910008b62b51296a4084f85a3cf93c9671f5c59ec71830d6b865706a1a4a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-02T00:18:27.044860Z","signature_b64":"l/kMoE0Mpg5GacDEzfXcyKABcg3OXXb4ne4nAPnaIK0hKaDyXo1kR+/PNZxFa99O3z45oBu3qOp29waIwrB7AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"23ae42651900a1be99246bbc3a79d685a35f5d8ac34a1ebaaea0615262e92be2","last_reissued_at":"2026-07-02T00:18:27.044242Z","signature_status":"signed_v1","first_computed_at":"2026-07-02T00:18:27.044242Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Probing the Sound Speed of Dark Energy with a Lunar Laser Interferometer","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Alfredo Gurrola, Oem Trivedi, Robert J. Scherrer","submitted_at":"2026-01-29T18:23:38Z","abstract_excerpt":"The sound speed of dark energy encodes fundamental information about the microphysics underlying cosmic acceleration, yet remains essentially unconstrained by existing observations. We demonstrate that a lunar-based laser interferometer, such as the proposed Laser Interferometer Lunar Antenna (LILA), can directly probe the sound speed of dark energy by measuring the real-time evolution of horizon-scale gravitational potentials. Operating in the ultra-low-frequency gravitational band inaccessible from Earth, LILA is sensitive to scalar metric perturbations sourced by dark energy dynamics. Using"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2601.22084","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2601.22084/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"2601.22084","created_at":"2026-07-02T00:18:27.044327+00:00"},{"alias_kind":"arxiv_version","alias_value":"2601.22084v1","created_at":"2026-07-02T00:18:27.044327+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2601.22084","created_at":"2026-07-02T00:18:27.044327+00:00"},{"alias_kind":"pith_short_12","alias_value":"EOXEEZIZACQ3","created_at":"2026-07-02T00:18:27.044327+00:00"},{"alias_kind":"pith_short_16","alias_value":"EOXEEZIZACQ35GJE","created_at":"2026-07-02T00:18:27.044327+00:00"},{"alias_kind":"pith_short_8","alias_value":"EOXEEZIZ","created_at":"2026-07-02T00:18:27.044327+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":2,"internal_anchor_count":2,"sample":[{"citing_arxiv_id":"2606.27441","citing_title":"Collider Probes of Dark Energy Microphysics","ref_index":50,"is_internal_anchor":true},{"citing_arxiv_id":"2605.11283","citing_title":"Black Hole Binary Detection Landscape for the Laser Interferometer Lunar Antenna (LILA): Signal-to-Noise Calculations & Science Cases","ref_index":107,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/EOXEEZIZACQ35GJENO6DU6OWQW","json":"https://pith.science/pith/EOXEEZIZACQ35GJENO6DU6OWQW.json","graph_json":"https://pith.science/api/pith-number/EOXEEZIZACQ35GJENO6DU6OWQW/graph.json","events_json":"https://pith.science/api/pith-number/EOXEEZIZACQ35GJENO6DU6OWQW/events.json","paper":"https://pith.science/paper/EOXEEZIZ"},"agent_actions":{"view_html":"https://pith.science/pith/EOXEEZIZACQ35GJENO6DU6OWQW","download_json":"https://pith.science/pith/EOXEEZIZACQ35GJENO6DU6OWQW.json","view_paper":"https://pith.science/paper/EOXEEZIZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2601.22084&json=true","fetch_graph":"https://pith.science/api/pith-number/EOXEEZIZACQ35GJENO6DU6OWQW/graph.json","fetch_events":"https://pith.science/api/pith-number/EOXEEZIZACQ35GJENO6DU6OWQW/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/EOXEEZIZACQ35GJENO6DU6OWQW/action/timestamp_anchor","attest_storage":"https://pith.science/pith/EOXEEZIZACQ35GJENO6DU6OWQW/action/storage_attestation","attest_author":"https://pith.science/pith/EOXEEZIZACQ35GJENO6DU6OWQW/action/author_attestation","sign_citation":"https://pith.science/pith/EOXEEZIZACQ35GJENO6DU6OWQW/action/citation_signature","submit_replication":"https://pith.science/pith/EOXEEZIZACQ35GJENO6DU6OWQW/action/replication_record"}},"created_at":"2026-07-02T00:18:27.044327+00:00","updated_at":"2026-07-02T00:18:27.044327+00:00"}