{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:JEVP6TLK5NH7554DW4MLUYPX5Y","short_pith_number":"pith:JEVP6TLK","canonical_record":{"source":{"id":"1505.03884","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2015-05-14T20:44:14Z","cross_cats_sorted":["cond-mat.quant-gas"],"title_canon_sha256":"2029e573af7a375a726d5162396f66d70d2ff9e81cf282ed3a92502586d27da9","abstract_canon_sha256":"c441a116de28c507b3f202d156851190f522cb35eca0cab45cd3dddad1edc559"},"schema_version":"1.0"},"canonical_sha256":"492aff4d6aeb4ffef783b718ba61f7ee2cecfdb94cb501a2aebb64a0962acff5","source":{"kind":"arxiv","id":"1505.03884","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.03884","created_at":"2026-05-18T02:09:40Z"},{"alias_kind":"arxiv_version","alias_value":"1505.03884v1","created_at":"2026-05-18T02:09:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.03884","created_at":"2026-05-18T02:09:40Z"},{"alias_kind":"pith_short_12","alias_value":"JEVP6TLK5NH7","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"JEVP6TLK5NH7554D","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"JEVP6TLK","created_at":"2026-05-18T12:29:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:JEVP6TLK5NH7554DW4MLUYPX5Y","target":"record","payload":{"canonical_record":{"source":{"id":"1505.03884","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2015-05-14T20:44:14Z","cross_cats_sorted":["cond-mat.quant-gas"],"title_canon_sha256":"2029e573af7a375a726d5162396f66d70d2ff9e81cf282ed3a92502586d27da9","abstract_canon_sha256":"c441a116de28c507b3f202d156851190f522cb35eca0cab45cd3dddad1edc559"},"schema_version":"1.0"},"canonical_sha256":"492aff4d6aeb4ffef783b718ba61f7ee2cecfdb94cb501a2aebb64a0962acff5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:09:40.827595Z","signature_b64":"LhlyUjIhEH8fs4MksUvNQ3MEuq7a3DeDo5v/qsg1O6ctlHNRZNQs55BflS9HdphFnepHw3Ty7zasifSpNw2RBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"492aff4d6aeb4ffef783b718ba61f7ee2cecfdb94cb501a2aebb64a0962acff5","last_reissued_at":"2026-05-18T02:09:40.826852Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:09:40.826852Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.03884","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":"2026-05-18T02:09:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mi/4zZzJOLCsNYamKKJVLWX1edfE+LtdSme6Zb6myYScwkwdUhSeEnvoLikgla+7Q4df2qHsLt9ln1m7Si0lDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T17:10:03.020502Z"},"content_sha256":"838ee840bc916ed427cceaccf7605e3ed2769fa6c97d6ea2a980fc8a1092d127","schema_version":"1.0","event_id":"sha256:838ee840bc916ed427cceaccf7605e3ed2769fa6c97d6ea2a980fc8a1092d127"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:JEVP6TLK5NH7554DW4MLUYPX5Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pomeranchuk instability and Bose condensation of scalar quanta in a Fermi liquid","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.quant-gas"],"primary_cat":"nucl-th","authors_text":"D. N. Voskresensky, E. E. Kolomeitsev","submitted_at":"2015-05-14T20:44:14Z","abstract_excerpt":"We study excitations in a normal Fermi liquid with a local scalar interaction. Spectrum of bosonic scalar-mode excitations is investigated for various values and momentum dependence of the scalar Landau parameter $f_0$ in the particle-hole channel. For $f_0 >0$ the conditions are found when the phase velocity on the spectrum of the zero sound acquires a minimum at a non-zero momentum. For $-1<f_0 <0$ there are only damped excitations, and for $f_0<-1$ the spectrum becomes unstable against a growth of scalar-mode excitations (a Pomeranchuk instability). An effective Lagrangian for the scalar ex"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.03884","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":""},"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":"2026-05-18T02:09:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c8E/w5JD8XgbyB2fzIEZJgq2/kGj7qYee2hhmtScSYbs6iFRvgqldgHfZ3Hf5TpECMbx2wD7sMuQVQsrIXjcAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T17:10:03.020839Z"},"content_sha256":"e35d9db8e1626518c49cef39a379f6744f6f34e79cd18f6ea5a997bfb7aae8fe","schema_version":"1.0","event_id":"sha256:e35d9db8e1626518c49cef39a379f6744f6f34e79cd18f6ea5a997bfb7aae8fe"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JEVP6TLK5NH7554DW4MLUYPX5Y/bundle.json","state_url":"https://pith.science/pith/JEVP6TLK5NH7554DW4MLUYPX5Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JEVP6TLK5NH7554DW4MLUYPX5Y/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":"2026-06-28T17:10:03Z","links":{"resolver":"https://pith.science/pith/JEVP6TLK5NH7554DW4MLUYPX5Y","bundle":"https://pith.science/pith/JEVP6TLK5NH7554DW4MLUYPX5Y/bundle.json","state":"https://pith.science/pith/JEVP6TLK5NH7554DW4MLUYPX5Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JEVP6TLK5NH7554DW4MLUYPX5Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:JEVP6TLK5NH7554DW4MLUYPX5Y","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":"c441a116de28c507b3f202d156851190f522cb35eca0cab45cd3dddad1edc559","cross_cats_sorted":["cond-mat.quant-gas"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2015-05-14T20:44:14Z","title_canon_sha256":"2029e573af7a375a726d5162396f66d70d2ff9e81cf282ed3a92502586d27da9"},"schema_version":"1.0","source":{"id":"1505.03884","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.03884","created_at":"2026-05-18T02:09:40Z"},{"alias_kind":"arxiv_version","alias_value":"1505.03884v1","created_at":"2026-05-18T02:09:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.03884","created_at":"2026-05-18T02:09:40Z"},{"alias_kind":"pith_short_12","alias_value":"JEVP6TLK5NH7","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"JEVP6TLK5NH7554D","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"JEVP6TLK","created_at":"2026-05-18T12:29:27Z"}],"graph_snapshots":[{"event_id":"sha256:e35d9db8e1626518c49cef39a379f6744f6f34e79cd18f6ea5a997bfb7aae8fe","target":"graph","created_at":"2026-05-18T02:09:40Z","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"},"paper":{"abstract_excerpt":"We study excitations in a normal Fermi liquid with a local scalar interaction. Spectrum of bosonic scalar-mode excitations is investigated for various values and momentum dependence of the scalar Landau parameter $f_0$ in the particle-hole channel. For $f_0 >0$ the conditions are found when the phase velocity on the spectrum of the zero sound acquires a minimum at a non-zero momentum. For $-1<f_0 <0$ there are only damped excitations, and for $f_0<-1$ the spectrum becomes unstable against a growth of scalar-mode excitations (a Pomeranchuk instability). An effective Lagrangian for the scalar ex","authors_text":"D. N. Voskresensky, E. E. Kolomeitsev","cross_cats":["cond-mat.quant-gas"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2015-05-14T20:44:14Z","title":"Pomeranchuk instability and Bose condensation of scalar quanta in a Fermi liquid"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.03884","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":"sha256:838ee840bc916ed427cceaccf7605e3ed2769fa6c97d6ea2a980fc8a1092d127","target":"record","created_at":"2026-05-18T02:09:40Z","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":"c441a116de28c507b3f202d156851190f522cb35eca0cab45cd3dddad1edc559","cross_cats_sorted":["cond-mat.quant-gas"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2015-05-14T20:44:14Z","title_canon_sha256":"2029e573af7a375a726d5162396f66d70d2ff9e81cf282ed3a92502586d27da9"},"schema_version":"1.0","source":{"id":"1505.03884","kind":"arxiv","version":1}},"canonical_sha256":"492aff4d6aeb4ffef783b718ba61f7ee2cecfdb94cb501a2aebb64a0962acff5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"492aff4d6aeb4ffef783b718ba61f7ee2cecfdb94cb501a2aebb64a0962acff5","first_computed_at":"2026-05-18T02:09:40.826852Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:09:40.826852Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LhlyUjIhEH8fs4MksUvNQ3MEuq7a3DeDo5v/qsg1O6ctlHNRZNQs55BflS9HdphFnepHw3Ty7zasifSpNw2RBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:09:40.827595Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.03884","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:838ee840bc916ed427cceaccf7605e3ed2769fa6c97d6ea2a980fc8a1092d127","sha256:e35d9db8e1626518c49cef39a379f6744f6f34e79cd18f6ea5a997bfb7aae8fe"],"state_sha256":"665dfad7b9bc37793af9fb8b01c415b79025437c37b543b50dca181bd4242aba"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zMxix9F7byxfJHwaCpywNF1LBHHJ252eabS5aO0xOkjh/I5dymIqAEoIASG9scyJymdm2IAqScDqzWwowrUFAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T17:10:03.022694Z","bundle_sha256":"f931283806b3772f12dd994e030f32b2522a20a4c07c83ac3c33db8673cd5410"}}