{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:43655ZJT6FN67EHOFNO7AUCQLR","short_pith_number":"pith:43655ZJT","canonical_record":{"source":{"id":"1306.0658","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-06-04T05:50:08Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"76a984cfcb7418bf2e63d4a184e6ee4631ccc11fc5b7370a28bd3d3cea8461ad","abstract_canon_sha256":"1f87c998c44404708374321494f0ab19fc1171dbd5468814b3f5b45648f59243"},"schema_version":"1.0"},"canonical_sha256":"e6fddee533f15bef90ee2b5df050505c7081018a0c63ae688af74cdacbee1a44","source":{"kind":"arxiv","id":"1306.0658","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.0658","created_at":"2026-05-18T01:49:33Z"},{"alias_kind":"arxiv_version","alias_value":"1306.0658v1","created_at":"2026-05-18T01:49:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.0658","created_at":"2026-05-18T01:49:33Z"},{"alias_kind":"pith_short_12","alias_value":"43655ZJT6FN6","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"43655ZJT6FN67EHO","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"43655ZJT","created_at":"2026-05-18T12:27:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:43655ZJT6FN67EHOFNO7AUCQLR","target":"record","payload":{"canonical_record":{"source":{"id":"1306.0658","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-06-04T05:50:08Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"76a984cfcb7418bf2e63d4a184e6ee4631ccc11fc5b7370a28bd3d3cea8461ad","abstract_canon_sha256":"1f87c998c44404708374321494f0ab19fc1171dbd5468814b3f5b45648f59243"},"schema_version":"1.0"},"canonical_sha256":"e6fddee533f15bef90ee2b5df050505c7081018a0c63ae688af74cdacbee1a44","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:49:33.267512Z","signature_b64":"zaoIYPSEhsktKCPeIybSKEBdgiZ75WWmN/rnDSy6CEeMU+tvwubl4DdwDSY1iu16vJInuJ4jNkgtCGC4+vj0CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e6fddee533f15bef90ee2b5df050505c7081018a0c63ae688af74cdacbee1a44","last_reissued_at":"2026-05-18T01:49:33.267008Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:49:33.267008Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1306.0658","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":"2026-05-18T01:49:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j3F4hZxnd5Z3b9/jpoXBnorNvcbKIFnn5FShiseqD2PjNRXMds2oPG48M+9dp5kvUAqn3Uao33IeL/0+UblbDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T18:08:35.832207Z"},"content_sha256":"ea530fc9c914e2d2881ca1f35d5563ac1d0700db66ccfc47ce21f89081f42560","schema_version":"1.0","event_id":"sha256:ea530fc9c914e2d2881ca1f35d5563ac1d0700db66ccfc47ce21f89081f42560"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:43655ZJT6FN67EHOFNO7AUCQLR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tamm-Hubbard surface states in the continuum","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.str-el","authors_text":"G. Della Valle, S. Longhi","submitted_at":"2013-06-04T05:50:08Z","abstract_excerpt":"In the framework of the Bose-Hubbard model, we show that two-particle surface bound states embedded in the continuum (BIC) can be sustained at the edge of a semi-infinite one-dimensional tight-binding lattice for any infinitesimally-small impurity potential $V$ at the lattice boundary. Such thresholdless surface states, that can be referred to as Tamm-Hubbard BIC states, exist provided that the impurity potential $V$ is attractive (repulsive) and the particle-particle Hubbard interaction $U$ is repulsive (attractive), i.e. for $UV<0$."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.0658","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":"2026-05-18T01:49:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QTTqdGeA+Mm4tvB8x4lrMoJdbZcSkVcYc3sBrT2f+njlHR2Z0nCiMPHULul0s8JENut1EI0Nf00nys7VqkglDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T18:08:35.832901Z"},"content_sha256":"4a148c224374922267baf374b5a9c4e7359291a33a79c198014797452257a454","schema_version":"1.0","event_id":"sha256:4a148c224374922267baf374b5a9c4e7359291a33a79c198014797452257a454"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/43655ZJT6FN67EHOFNO7AUCQLR/bundle.json","state_url":"https://pith.science/pith/43655ZJT6FN67EHOFNO7AUCQLR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/43655ZJT6FN67EHOFNO7AUCQLR/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":"2026-05-25T18:08:35Z","links":{"resolver":"https://pith.science/pith/43655ZJT6FN67EHOFNO7AUCQLR","bundle":"https://pith.science/pith/43655ZJT6FN67EHOFNO7AUCQLR/bundle.json","state":"https://pith.science/pith/43655ZJT6FN67EHOFNO7AUCQLR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/43655ZJT6FN67EHOFNO7AUCQLR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:43655ZJT6FN67EHOFNO7AUCQLR","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":"1f87c998c44404708374321494f0ab19fc1171dbd5468814b3f5b45648f59243","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-06-04T05:50:08Z","title_canon_sha256":"76a984cfcb7418bf2e63d4a184e6ee4631ccc11fc5b7370a28bd3d3cea8461ad"},"schema_version":"1.0","source":{"id":"1306.0658","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.0658","created_at":"2026-05-18T01:49:33Z"},{"alias_kind":"arxiv_version","alias_value":"1306.0658v1","created_at":"2026-05-18T01:49:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.0658","created_at":"2026-05-18T01:49:33Z"},{"alias_kind":"pith_short_12","alias_value":"43655ZJT6FN6","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"43655ZJT6FN67EHO","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"43655ZJT","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:4a148c224374922267baf374b5a9c4e7359291a33a79c198014797452257a454","target":"graph","created_at":"2026-05-18T01:49:33Z","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":"In the framework of the Bose-Hubbard model, we show that two-particle surface bound states embedded in the continuum (BIC) can be sustained at the edge of a semi-infinite one-dimensional tight-binding lattice for any infinitesimally-small impurity potential $V$ at the lattice boundary. Such thresholdless surface states, that can be referred to as Tamm-Hubbard BIC states, exist provided that the impurity potential $V$ is attractive (repulsive) and the particle-particle Hubbard interaction $U$ is repulsive (attractive), i.e. for $UV<0$.","authors_text":"G. Della Valle, S. Longhi","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-06-04T05:50:08Z","title":"Tamm-Hubbard surface states in the continuum"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.0658","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:ea530fc9c914e2d2881ca1f35d5563ac1d0700db66ccfc47ce21f89081f42560","target":"record","created_at":"2026-05-18T01:49:33Z","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":"1f87c998c44404708374321494f0ab19fc1171dbd5468814b3f5b45648f59243","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-06-04T05:50:08Z","title_canon_sha256":"76a984cfcb7418bf2e63d4a184e6ee4631ccc11fc5b7370a28bd3d3cea8461ad"},"schema_version":"1.0","source":{"id":"1306.0658","kind":"arxiv","version":1}},"canonical_sha256":"e6fddee533f15bef90ee2b5df050505c7081018a0c63ae688af74cdacbee1a44","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e6fddee533f15bef90ee2b5df050505c7081018a0c63ae688af74cdacbee1a44","first_computed_at":"2026-05-18T01:49:33.267008Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:49:33.267008Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zaoIYPSEhsktKCPeIybSKEBdgiZ75WWmN/rnDSy6CEeMU+tvwubl4DdwDSY1iu16vJInuJ4jNkgtCGC4+vj0CA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:49:33.267512Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.0658","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ea530fc9c914e2d2881ca1f35d5563ac1d0700db66ccfc47ce21f89081f42560","sha256:4a148c224374922267baf374b5a9c4e7359291a33a79c198014797452257a454"],"state_sha256":"501f1493ed3454055380e16a95acb46bc651e841976e31c49a138e92e0f0f28f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zC01OaTkfL1cL7MBijh8iT7O31sWpAXHINpCyHhryYr8rF1WuHwTCofqOGiQMPYcFFw1DZFhn67/aUCXuF6zAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T18:08:35.836736Z","bundle_sha256":"982eeb4fa0e4f71b81934bb7c7517e97b7fcae1664b2b4f87ef4493a01870513"}}