{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:N2F3SBBPMFI7B6IFTYHBL225GL","short_pith_number":"pith:N2F3SBBP","canonical_record":{"source":{"id":"1301.4462","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-01-18T18:56:26Z","cross_cats_sorted":[],"title_canon_sha256":"5ca44ee8ced3512517bb0ff074b710365e0cf115cf97e5739dfd32d19fb38bb5","abstract_canon_sha256":"6907ffeecc0f0aa0d90e006c44c1a4fd5b8373d67a665b77fd0fdef38f6a43ba"},"schema_version":"1.0"},"canonical_sha256":"6e8bb9042f6151f0f9059e0e15eb5d32e963063bb3624c73668beef1af47b481","source":{"kind":"arxiv","id":"1301.4462","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.4462","created_at":"2026-05-18T03:17:14Z"},{"alias_kind":"arxiv_version","alias_value":"1301.4462v4","created_at":"2026-05-18T03:17:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.4462","created_at":"2026-05-18T03:17:14Z"},{"alias_kind":"pith_short_12","alias_value":"N2F3SBBPMFI7","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"N2F3SBBPMFI7B6IF","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"N2F3SBBP","created_at":"2026-05-18T12:27:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:N2F3SBBPMFI7B6IFTYHBL225GL","target":"record","payload":{"canonical_record":{"source":{"id":"1301.4462","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-01-18T18:56:26Z","cross_cats_sorted":[],"title_canon_sha256":"5ca44ee8ced3512517bb0ff074b710365e0cf115cf97e5739dfd32d19fb38bb5","abstract_canon_sha256":"6907ffeecc0f0aa0d90e006c44c1a4fd5b8373d67a665b77fd0fdef38f6a43ba"},"schema_version":"1.0"},"canonical_sha256":"6e8bb9042f6151f0f9059e0e15eb5d32e963063bb3624c73668beef1af47b481","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:17:14.594406Z","signature_b64":"W3MV/LtX1e31oOnWZl9ExMK5JTZpSvPPUk7/dXUXqjXYwXYH7mACF4LDMKVw8TtaKWcrBbRv6C/LbtCbYykuAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6e8bb9042f6151f0f9059e0e15eb5d32e963063bb3624c73668beef1af47b481","last_reissued_at":"2026-05-18T03:17:14.593696Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:17:14.593696Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1301.4462","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:17:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fujSUJoOLjvxV74zPPpGdYnK5m51lqa7KcaAekMli0xDjPmhGEvN/CXq1tZlOynjPMIHNbAzxIb5iK3/FmE3Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T23:30:18.646199Z"},"content_sha256":"05edb06fdf777c998129ac81d9904cc7dd1b6278c8d03253d1434f323abbcd83","schema_version":"1.0","event_id":"sha256:05edb06fdf777c998129ac81d9904cc7dd1b6278c8d03253d1434f323abbcd83"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:N2F3SBBPMFI7B6IFTYHBL225GL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The quantum Rabi model for two qubits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"B. M. Rodr\\'iguez-Lara, S. A. Chilingaryan","submitted_at":"2013-01-18T18:56:26Z","abstract_excerpt":"We study the two-qubit Rabi model in the most general case where the qubits are different from each other. The spectrum of the system in the ultrastrong-coupling regime is shown to converge to two forced oscillator chains by perturbation theory. An even and odd decomposition of the Hilbert space allows us to calculate the spectra in any given parameter regime; the cases studied confirm our perturbation theory prediction in the ultrastrong-coupling regime and point to crossings in the spectra within each parity subspace in the moderate-coupling regime. The normal modes of the system are calcula"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.4462","kind":"arxiv","version":4},"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":"2026-05-18T03:17:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dQgSS4gN1rZuTVIzV1s1SiIL7V+wBaZl7l8a+7mbH5wyAZ2ban5PGnZ6RypjLtA/Uj+yWSLfr8odKZU0byZfAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T23:30:18.646903Z"},"content_sha256":"b34e85dd95479ce0aabffbbb94507c040a83da76703119321ce34e1b3ed0176b","schema_version":"1.0","event_id":"sha256:b34e85dd95479ce0aabffbbb94507c040a83da76703119321ce34e1b3ed0176b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/N2F3SBBPMFI7B6IFTYHBL225GL/bundle.json","state_url":"https://pith.science/pith/N2F3SBBPMFI7B6IFTYHBL225GL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/N2F3SBBPMFI7B6IFTYHBL225GL/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":"2026-06-04T23:30:18Z","links":{"resolver":"https://pith.science/pith/N2F3SBBPMFI7B6IFTYHBL225GL","bundle":"https://pith.science/pith/N2F3SBBPMFI7B6IFTYHBL225GL/bundle.json","state":"https://pith.science/pith/N2F3SBBPMFI7B6IFTYHBL225GL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/N2F3SBBPMFI7B6IFTYHBL225GL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:N2F3SBBPMFI7B6IFTYHBL225GL","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":"6907ffeecc0f0aa0d90e006c44c1a4fd5b8373d67a665b77fd0fdef38f6a43ba","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-01-18T18:56:26Z","title_canon_sha256":"5ca44ee8ced3512517bb0ff074b710365e0cf115cf97e5739dfd32d19fb38bb5"},"schema_version":"1.0","source":{"id":"1301.4462","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.4462","created_at":"2026-05-18T03:17:14Z"},{"alias_kind":"arxiv_version","alias_value":"1301.4462v4","created_at":"2026-05-18T03:17:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.4462","created_at":"2026-05-18T03:17:14Z"},{"alias_kind":"pith_short_12","alias_value":"N2F3SBBPMFI7","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"N2F3SBBPMFI7B6IF","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"N2F3SBBP","created_at":"2026-05-18T12:27:52Z"}],"graph_snapshots":[{"event_id":"sha256:b34e85dd95479ce0aabffbbb94507c040a83da76703119321ce34e1b3ed0176b","target":"graph","created_at":"2026-05-18T03:17:14Z","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 the two-qubit Rabi model in the most general case where the qubits are different from each other. The spectrum of the system in the ultrastrong-coupling regime is shown to converge to two forced oscillator chains by perturbation theory. An even and odd decomposition of the Hilbert space allows us to calculate the spectra in any given parameter regime; the cases studied confirm our perturbation theory prediction in the ultrastrong-coupling regime and point to crossings in the spectra within each parity subspace in the moderate-coupling regime. The normal modes of the system are calcula","authors_text":"B. M. Rodr\\'iguez-Lara, S. A. Chilingaryan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-01-18T18:56:26Z","title":"The quantum Rabi model for two qubits"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.4462","kind":"arxiv","version":4},"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":"sha256:05edb06fdf777c998129ac81d9904cc7dd1b6278c8d03253d1434f323abbcd83","target":"record","created_at":"2026-05-18T03:17:14Z","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":"6907ffeecc0f0aa0d90e006c44c1a4fd5b8373d67a665b77fd0fdef38f6a43ba","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-01-18T18:56:26Z","title_canon_sha256":"5ca44ee8ced3512517bb0ff074b710365e0cf115cf97e5739dfd32d19fb38bb5"},"schema_version":"1.0","source":{"id":"1301.4462","kind":"arxiv","version":4}},"canonical_sha256":"6e8bb9042f6151f0f9059e0e15eb5d32e963063bb3624c73668beef1af47b481","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6e8bb9042f6151f0f9059e0e15eb5d32e963063bb3624c73668beef1af47b481","first_computed_at":"2026-05-18T03:17:14.593696Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:17:14.593696Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"W3MV/LtX1e31oOnWZl9ExMK5JTZpSvPPUk7/dXUXqjXYwXYH7mACF4LDMKVw8TtaKWcrBbRv6C/LbtCbYykuAw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:17:14.594406Z","signed_message":"canonical_sha256_bytes"},"source_id":"1301.4462","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:05edb06fdf777c998129ac81d9904cc7dd1b6278c8d03253d1434f323abbcd83","sha256:b34e85dd95479ce0aabffbbb94507c040a83da76703119321ce34e1b3ed0176b"],"state_sha256":"2cf743322a651072a9b972420d3b4a73838e7bd3e06be2896f43418cbd8b0453"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sOOJnyXssmMaILbutKB55PbtkivBJQkgttFPmTDoxKxoQFw+5QkLZB7KzBQndcect2d6cPnyuOsFs9aGlmfNCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T23:30:18.650052Z","bundle_sha256":"b5a8fb35a818ff9d859df0e596bd92ef76dfc1e60fffb2e7b2f2ef9cfa3646bc"}}