{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:2TADW7HKP4TYJXPCNOSJJDZES5","short_pith_number":"pith:2TADW7HK","canonical_record":{"source":{"id":"2107.03391","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-07-07T18:00:00Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"f4b7bf75c31536d80ca7b6414fa0c21faeb0436017f9fe1ec1dafdd21fb70f36","abstract_canon_sha256":"dccc9d43740d7a0a7c3384c4a9997dd8b17b914ff9c1ccbe48a981e53049a518"},"schema_version":"1.0"},"canonical_sha256":"d4c03b7cea7f2784dde26ba4948f24974d2fd6231d4ffb5aaafb96cac5700719","source":{"kind":"arxiv","id":"2107.03391","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.03391","created_at":"2026-07-05T02:56:05Z"},{"alias_kind":"arxiv_version","alias_value":"2107.03391v1","created_at":"2026-07-05T02:56:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.03391","created_at":"2026-07-05T02:56:05Z"},{"alias_kind":"pith_short_12","alias_value":"2TADW7HKP4TY","created_at":"2026-07-05T02:56:05Z"},{"alias_kind":"pith_short_16","alias_value":"2TADW7HKP4TYJXPC","created_at":"2026-07-05T02:56:05Z"},{"alias_kind":"pith_short_8","alias_value":"2TADW7HK","created_at":"2026-07-05T02:56:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:2TADW7HKP4TYJXPCNOSJJDZES5","target":"record","payload":{"canonical_record":{"source":{"id":"2107.03391","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-07-07T18:00:00Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"f4b7bf75c31536d80ca7b6414fa0c21faeb0436017f9fe1ec1dafdd21fb70f36","abstract_canon_sha256":"dccc9d43740d7a0a7c3384c4a9997dd8b17b914ff9c1ccbe48a981e53049a518"},"schema_version":"1.0"},"canonical_sha256":"d4c03b7cea7f2784dde26ba4948f24974d2fd6231d4ffb5aaafb96cac5700719","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:56:05.453585Z","signature_b64":"xaDnLdeBkZWRucMEus0RN+aEx+CyP6oUyqhKcaX+Vdf4/0PvUktBmr52TdSizdUMcKcNp906zLKw2S7aZWEJDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d4c03b7cea7f2784dde26ba4948f24974d2fd6231d4ffb5aaafb96cac5700719","last_reissued_at":"2026-07-05T02:56:05.453144Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:56:05.453144Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2107.03391","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:56:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C2Qff8PaibXeJc3A8+yppe5AMA4H90KxrA7FsR4+B9Pt2Yp1wfLJ2wlZgiks2v0zXJyMMVISSJFw8h397xXiDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T15:57:50.148292Z"},"content_sha256":"499a02d6fffc6ddadec4fe151b8ca534df1b48a1b8bec5b7f51f0af9731da491","schema_version":"1.0","event_id":"sha256:499a02d6fffc6ddadec4fe151b8ca534df1b48a1b8bec5b7f51f0af9731da491"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:2TADW7HKP4TYJXPCNOSJJDZES5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the choice of entropy variables in multifield inflation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Francesco Muia, Francisco G. Pedro, Gian Paolo Vacca, Michele Cicoli, Veronica Guidetti","submitted_at":"2021-07-07T18:00:00Z","abstract_excerpt":"We discuss the usefulness and theoretical consistency of different entropy variables used in the literature to describe isocurvature perturbations in multifield inflationary models with a generic curved field space. We clarify which is the proper entropy variable to be used to match the evolution of isocurvature modes during inflation to the one after the reheating epoch in order to compare with observational constraints. In particular, we find that commonly used variables, as the relative entropy perturbation or the one associated to the decomposition in tangent and normal perturbations with "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.03391","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/2107.03391/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:56:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fCGA8bo2vr9He8+cmMlGwL9awhB9h/UeOwKoeKPTCHBAP2hMXrYPVoRFKamlkAOx/HOGMn6cSMSmj1OgxMLECg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T15:57:50.149202Z"},"content_sha256":"eb6e7e66e3914af1cc94be1b926a26483a7fe2c23b2480fe05b33926e595e50b","schema_version":"1.0","event_id":"sha256:eb6e7e66e3914af1cc94be1b926a26483a7fe2c23b2480fe05b33926e595e50b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2TADW7HKP4TYJXPCNOSJJDZES5/bundle.json","state_url":"https://pith.science/pith/2TADW7HKP4TYJXPCNOSJJDZES5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2TADW7HKP4TYJXPCNOSJJDZES5/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-03T15:57:50Z","links":{"resolver":"https://pith.science/pith/2TADW7HKP4TYJXPCNOSJJDZES5","bundle":"https://pith.science/pith/2TADW7HKP4TYJXPCNOSJJDZES5/bundle.json","state":"https://pith.science/pith/2TADW7HKP4TYJXPCNOSJJDZES5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2TADW7HKP4TYJXPCNOSJJDZES5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:2TADW7HKP4TYJXPCNOSJJDZES5","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"dccc9d43740d7a0a7c3384c4a9997dd8b17b914ff9c1ccbe48a981e53049a518","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-07-07T18:00:00Z","title_canon_sha256":"f4b7bf75c31536d80ca7b6414fa0c21faeb0436017f9fe1ec1dafdd21fb70f36"},"schema_version":"1.0","source":{"id":"2107.03391","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.03391","created_at":"2026-07-05T02:56:05Z"},{"alias_kind":"arxiv_version","alias_value":"2107.03391v1","created_at":"2026-07-05T02:56:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.03391","created_at":"2026-07-05T02:56:05Z"},{"alias_kind":"pith_short_12","alias_value":"2TADW7HKP4TY","created_at":"2026-07-05T02:56:05Z"},{"alias_kind":"pith_short_16","alias_value":"2TADW7HKP4TYJXPC","created_at":"2026-07-05T02:56:05Z"},{"alias_kind":"pith_short_8","alias_value":"2TADW7HK","created_at":"2026-07-05T02:56:05Z"}],"graph_snapshots":[{"event_id":"sha256:eb6e7e66e3914af1cc94be1b926a26483a7fe2c23b2480fe05b33926e595e50b","target":"graph","created_at":"2026-07-05T02:56:05Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2107.03391/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We discuss the usefulness and theoretical consistency of different entropy variables used in the literature to describe isocurvature perturbations in multifield inflationary models with a generic curved field space. We clarify which is the proper entropy variable to be used to match the evolution of isocurvature modes during inflation to the one after the reheating epoch in order to compare with observational constraints. In particular, we find that commonly used variables, as the relative entropy perturbation or the one associated to the decomposition in tangent and normal perturbations with ","authors_text":"Francesco Muia, Francisco G. Pedro, Gian Paolo Vacca, Michele Cicoli, Veronica Guidetti","cross_cats":["gr-qc","hep-ph","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-07-07T18:00:00Z","title":"On the choice of entropy variables in multifield inflation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.03391","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:499a02d6fffc6ddadec4fe151b8ca534df1b48a1b8bec5b7f51f0af9731da491","target":"record","created_at":"2026-07-05T02:56:05Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"dccc9d43740d7a0a7c3384c4a9997dd8b17b914ff9c1ccbe48a981e53049a518","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-07-07T18:00:00Z","title_canon_sha256":"f4b7bf75c31536d80ca7b6414fa0c21faeb0436017f9fe1ec1dafdd21fb70f36"},"schema_version":"1.0","source":{"id":"2107.03391","kind":"arxiv","version":1}},"canonical_sha256":"d4c03b7cea7f2784dde26ba4948f24974d2fd6231d4ffb5aaafb96cac5700719","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d4c03b7cea7f2784dde26ba4948f24974d2fd6231d4ffb5aaafb96cac5700719","first_computed_at":"2026-07-05T02:56:05.453144Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:56:05.453144Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xaDnLdeBkZWRucMEus0RN+aEx+CyP6oUyqhKcaX+Vdf4/0PvUktBmr52TdSizdUMcKcNp906zLKw2S7aZWEJDA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:56:05.453585Z","signed_message":"canonical_sha256_bytes"},"source_id":"2107.03391","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:499a02d6fffc6ddadec4fe151b8ca534df1b48a1b8bec5b7f51f0af9731da491","sha256:eb6e7e66e3914af1cc94be1b926a26483a7fe2c23b2480fe05b33926e595e50b"],"state_sha256":"5743b7cf6c04be97be14e3fd43ed9b99a0e096ea95a070571ff581741e8e719f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fvso6kc6pOBfRzem+iLdf3rf3RJWB2td8EHJVLRtZ3wFpJGk93kOzSOr8X6QKSK7l0pg1BCGqKE8Nzg8JgfLAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T15:57:50.163601Z","bundle_sha256":"069e33b4d108eef7815a5b863c819effebc1b97586d0d149f5d751d05cb33040"}}