{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:MZJPNEO727TE5H7UB2FLVSIEKJ","short_pith_number":"pith:MZJPNEO7","canonical_record":{"source":{"id":"1612.09119","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-12-29T12:27:19Z","cross_cats_sorted":[],"title_canon_sha256":"066d0481886379852ec722c8d35dfdedc54c63c89977059abef9839a8cabe064","abstract_canon_sha256":"ed5bf114e733ad3915013c09ed271bb670b418c9a00e45f2a40622a30d4a2345"},"schema_version":"1.0"},"canonical_sha256":"6652f691dfd7e64e9ff40e8abac90452629840bf3de626ffd3cf6ec089398265","source":{"kind":"arxiv","id":"1612.09119","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.09119","created_at":"2026-05-18T00:46:13Z"},{"alias_kind":"arxiv_version","alias_value":"1612.09119v2","created_at":"2026-05-18T00:46:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.09119","created_at":"2026-05-18T00:46:13Z"},{"alias_kind":"pith_short_12","alias_value":"MZJPNEO727TE","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"MZJPNEO727TE5H7U","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"MZJPNEO7","created_at":"2026-05-18T12:30:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:MZJPNEO727TE5H7UB2FLVSIEKJ","target":"record","payload":{"canonical_record":{"source":{"id":"1612.09119","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-12-29T12:27:19Z","cross_cats_sorted":[],"title_canon_sha256":"066d0481886379852ec722c8d35dfdedc54c63c89977059abef9839a8cabe064","abstract_canon_sha256":"ed5bf114e733ad3915013c09ed271bb670b418c9a00e45f2a40622a30d4a2345"},"schema_version":"1.0"},"canonical_sha256":"6652f691dfd7e64e9ff40e8abac90452629840bf3de626ffd3cf6ec089398265","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:46:13.317185Z","signature_b64":"/glTlsXI2qvW9qafS+zo1IUC7RuMaP39A94RGwbUVOJqSDfTOx1BObZTxInsDL6yOrS4D61hadNJBnTqm0SiBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6652f691dfd7e64e9ff40e8abac90452629840bf3de626ffd3cf6ec089398265","last_reissued_at":"2026-05-18T00:46:13.316798Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:46:13.316798Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1612.09119","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:46:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UIqxjzlkNi9ZDCXJrymz99JSvJJQgAGVoZiyf4kwHdqx69sQosr25Pe+PvM5YV5x5H+ZFzMU5LCHf+dOKr0xAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T14:37:17.372239Z"},"content_sha256":"d28703fe0fc19590e2516e5315122782c013b2cc4ff55fe504d2ff63b2777bb9","schema_version":"1.0","event_id":"sha256:d28703fe0fc19590e2516e5315122782c013b2cc4ff55fe504d2ff63b2777bb9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:MZJPNEO727TE5H7UB2FLVSIEKJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultrastrong-coupling quantum-phase-transition phenomena in a few-qubit circuit QED system","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Wen-Juan Yang, Xiang-Bin Wang","submitted_at":"2016-12-29T12:27:19Z","abstract_excerpt":"We study ultrastrong-coupling quantum-phase-transition phenomena in a few-qubit system. In the one-qubit case, three second-order transitions occur and the Goldstone mode emerges under the condition of ultrastrong-coupling strength. Moreover, a first-order phase transition occurs between two different superradiant phases. In the two-qubit case, a two-qubit Hamiltonian with qubit-qubit interactions is analyzed fully quantum mechanically. We show that the quantum phase transition is inhibited even in the ultrastrong-coupling regime in this model. In addition, in the three-qubit model, the superr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.09119","kind":"arxiv","version":2},"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":"2026-05-18T00:46:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+c55Or2pirXdUQ2c2YdV3jVx0bSXDRrbHF+HV6Glp68/pSYSTD2owroeZb7jhsPQTJEkahWkxgJc327iXky6AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T14:37:17.372597Z"},"content_sha256":"83d7aa29022e2429c09566cc4a16610349040c898712a306efc313f26143ea2f","schema_version":"1.0","event_id":"sha256:83d7aa29022e2429c09566cc4a16610349040c898712a306efc313f26143ea2f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MZJPNEO727TE5H7UB2FLVSIEKJ/bundle.json","state_url":"https://pith.science/pith/MZJPNEO727TE5H7UB2FLVSIEKJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MZJPNEO727TE5H7UB2FLVSIEKJ/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":"2026-05-28T14:37:17Z","links":{"resolver":"https://pith.science/pith/MZJPNEO727TE5H7UB2FLVSIEKJ","bundle":"https://pith.science/pith/MZJPNEO727TE5H7UB2FLVSIEKJ/bundle.json","state":"https://pith.science/pith/MZJPNEO727TE5H7UB2FLVSIEKJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MZJPNEO727TE5H7UB2FLVSIEKJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:MZJPNEO727TE5H7UB2FLVSIEKJ","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":"ed5bf114e733ad3915013c09ed271bb670b418c9a00e45f2a40622a30d4a2345","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-12-29T12:27:19Z","title_canon_sha256":"066d0481886379852ec722c8d35dfdedc54c63c89977059abef9839a8cabe064"},"schema_version":"1.0","source":{"id":"1612.09119","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.09119","created_at":"2026-05-18T00:46:13Z"},{"alias_kind":"arxiv_version","alias_value":"1612.09119v2","created_at":"2026-05-18T00:46:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.09119","created_at":"2026-05-18T00:46:13Z"},{"alias_kind":"pith_short_12","alias_value":"MZJPNEO727TE","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"MZJPNEO727TE5H7U","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"MZJPNEO7","created_at":"2026-05-18T12:30:32Z"}],"graph_snapshots":[{"event_id":"sha256:83d7aa29022e2429c09566cc4a16610349040c898712a306efc313f26143ea2f","target":"graph","created_at":"2026-05-18T00:46:13Z","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 ultrastrong-coupling quantum-phase-transition phenomena in a few-qubit system. In the one-qubit case, three second-order transitions occur and the Goldstone mode emerges under the condition of ultrastrong-coupling strength. Moreover, a first-order phase transition occurs between two different superradiant phases. In the two-qubit case, a two-qubit Hamiltonian with qubit-qubit interactions is analyzed fully quantum mechanically. We show that the quantum phase transition is inhibited even in the ultrastrong-coupling regime in this model. In addition, in the three-qubit model, the superr","authors_text":"Wen-Juan Yang, Xiang-Bin Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-12-29T12:27:19Z","title":"Ultrastrong-coupling quantum-phase-transition phenomena in a few-qubit circuit QED system"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.09119","kind":"arxiv","version":2},"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:d28703fe0fc19590e2516e5315122782c013b2cc4ff55fe504d2ff63b2777bb9","target":"record","created_at":"2026-05-18T00:46:13Z","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":"ed5bf114e733ad3915013c09ed271bb670b418c9a00e45f2a40622a30d4a2345","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-12-29T12:27:19Z","title_canon_sha256":"066d0481886379852ec722c8d35dfdedc54c63c89977059abef9839a8cabe064"},"schema_version":"1.0","source":{"id":"1612.09119","kind":"arxiv","version":2}},"canonical_sha256":"6652f691dfd7e64e9ff40e8abac90452629840bf3de626ffd3cf6ec089398265","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6652f691dfd7e64e9ff40e8abac90452629840bf3de626ffd3cf6ec089398265","first_computed_at":"2026-05-18T00:46:13.316798Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:46:13.316798Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/glTlsXI2qvW9qafS+zo1IUC7RuMaP39A94RGwbUVOJqSDfTOx1BObZTxInsDL6yOrS4D61hadNJBnTqm0SiBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:46:13.317185Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.09119","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d28703fe0fc19590e2516e5315122782c013b2cc4ff55fe504d2ff63b2777bb9","sha256:83d7aa29022e2429c09566cc4a16610349040c898712a306efc313f26143ea2f"],"state_sha256":"8a3f9e4fa13d0200a499dbecd426708a9d09ffd6fde535847be86b648ccf1526"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UHYI00PtuGASUIpR7U7Nj9sKYEK2CDRn5HG98CnG/iawcnjdxNAgQHl9KtuZbqn45zcxi1hgn0pES5ASN9VPDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T14:37:17.374515Z","bundle_sha256":"70ae07bf8f5eac0fa539cf1c2e9b2757ab3772914546b8a7ef80a58a37ac6e25"}}