{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:4RG5C4JIIVEOB4ORSG66N57WNR","short_pith_number":"pith:4RG5C4JI","canonical_record":{"source":{"id":"1407.2075","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-08T13:32:08Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"e6c67f2f8f050b20578bd872e2c79549bf1e088bfa586004c7474c65e590af06","abstract_canon_sha256":"e0ebdebc8713ace5a3b6a801beb5f3902a3905b8687ed2d1ecb5128cd0e22a3f"},"schema_version":"1.0"},"canonical_sha256":"e44dd171284548e0f1d191bde6f7f66c5fe36a654d86f96c8b574994f465158c","source":{"kind":"arxiv","id":"1407.2075","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.2075","created_at":"2026-05-18T02:17:24Z"},{"alias_kind":"arxiv_version","alias_value":"1407.2075v2","created_at":"2026-05-18T02:17:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.2075","created_at":"2026-05-18T02:17:24Z"},{"alias_kind":"pith_short_12","alias_value":"4RG5C4JIIVEO","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"4RG5C4JIIVEOB4OR","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"4RG5C4JI","created_at":"2026-05-18T12:28:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:4RG5C4JIIVEOB4ORSG66N57WNR","target":"record","payload":{"canonical_record":{"source":{"id":"1407.2075","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-08T13:32:08Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"e6c67f2f8f050b20578bd872e2c79549bf1e088bfa586004c7474c65e590af06","abstract_canon_sha256":"e0ebdebc8713ace5a3b6a801beb5f3902a3905b8687ed2d1ecb5128cd0e22a3f"},"schema_version":"1.0"},"canonical_sha256":"e44dd171284548e0f1d191bde6f7f66c5fe36a654d86f96c8b574994f465158c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:17:24.584122Z","signature_b64":"OgzZm/f0CtesUYcxA4PIz73d9RiN4BK+Xs9N/sgT1JLglPLp4VEvB2c623zStctZFP/vRccvJIuRQvmHcuF8DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e44dd171284548e0f1d191bde6f7f66c5fe36a654d86f96c8b574994f465158c","last_reissued_at":"2026-05-18T02:17:24.583403Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:17:24.583403Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.2075","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":"2026-05-18T02:17:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r1h5DeVyefmshGIqxCGF++ctp8PxLIT3ORztjCrCfki2zaeWhfhBMckh470dSNFngW7A23eJTzGhfkwFE/ZiAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T17:00:02.817874Z"},"content_sha256":"003f5da0a8cb1d49998a1d8d155c0c112f2cb8bc293fd8f777ecd04ddf9c2432","schema_version":"1.0","event_id":"sha256:003f5da0a8cb1d49998a1d8d155c0c112f2cb8bc293fd8f777ecd04ddf9c2432"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:4RG5C4JIIVEOB4ORSG66N57WNR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An ansatz to the quantum phase transition in a dissipative two-qubit system","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"quant-ph","authors_text":"Hang Zheng, Yang Zhao, Zhiguo L\\\"u","submitted_at":"2014-07-08T13:32:08Z","abstract_excerpt":"By means of a unitary transformation, we propose an ansatz to study quantum phase transitions in the ground state of a two-qubit system interacting with a dissipative reservoir. First, the ground state phase diagram is analyzed in the presence of the Ohmic and sub-Ohmic bath using an analytic ground state wave function which takes into account the competition between intrasite tunneling and intersite correlation. The quantum critical point is determined as the transition point from non-degenerate to degenerate ground state and our calculated critical coupling strength $\\alpha_c$ agrees with th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.2075","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":"2026-05-18T02:17:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TaFuhHIn0TrNTYzulI8kVrcv2kiSsKmDsYsMTJ/oRVUZgl45ol9G4UqcdiRomtCjDJlQs06LCcvYjaQCGwsABw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T17:00:02.818565Z"},"content_sha256":"ee6d4601a4fcfaf69b9eba85ec85cc33812cc1af15824604b55172fa32846ee0","schema_version":"1.0","event_id":"sha256:ee6d4601a4fcfaf69b9eba85ec85cc33812cc1af15824604b55172fa32846ee0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4RG5C4JIIVEOB4ORSG66N57WNR/bundle.json","state_url":"https://pith.science/pith/4RG5C4JIIVEOB4ORSG66N57WNR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4RG5C4JIIVEOB4ORSG66N57WNR/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":"2026-05-26T17:00:02Z","links":{"resolver":"https://pith.science/pith/4RG5C4JIIVEOB4ORSG66N57WNR","bundle":"https://pith.science/pith/4RG5C4JIIVEOB4ORSG66N57WNR/bundle.json","state":"https://pith.science/pith/4RG5C4JIIVEOB4ORSG66N57WNR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4RG5C4JIIVEOB4ORSG66N57WNR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:4RG5C4JIIVEOB4ORSG66N57WNR","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":"e0ebdebc8713ace5a3b6a801beb5f3902a3905b8687ed2d1ecb5128cd0e22a3f","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-08T13:32:08Z","title_canon_sha256":"e6c67f2f8f050b20578bd872e2c79549bf1e088bfa586004c7474c65e590af06"},"schema_version":"1.0","source":{"id":"1407.2075","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.2075","created_at":"2026-05-18T02:17:24Z"},{"alias_kind":"arxiv_version","alias_value":"1407.2075v2","created_at":"2026-05-18T02:17:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.2075","created_at":"2026-05-18T02:17:24Z"},{"alias_kind":"pith_short_12","alias_value":"4RG5C4JIIVEO","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"4RG5C4JIIVEOB4OR","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"4RG5C4JI","created_at":"2026-05-18T12:28:14Z"}],"graph_snapshots":[{"event_id":"sha256:ee6d4601a4fcfaf69b9eba85ec85cc33812cc1af15824604b55172fa32846ee0","target":"graph","created_at":"2026-05-18T02:17:24Z","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":"By means of a unitary transformation, we propose an ansatz to study quantum phase transitions in the ground state of a two-qubit system interacting with a dissipative reservoir. First, the ground state phase diagram is analyzed in the presence of the Ohmic and sub-Ohmic bath using an analytic ground state wave function which takes into account the competition between intrasite tunneling and intersite correlation. The quantum critical point is determined as the transition point from non-degenerate to degenerate ground state and our calculated critical coupling strength $\\alpha_c$ agrees with th","authors_text":"Hang Zheng, Yang Zhao, Zhiguo L\\\"u","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-08T13:32:08Z","title":"An ansatz to the quantum phase transition in a dissipative two-qubit system"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.2075","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":"sha256:003f5da0a8cb1d49998a1d8d155c0c112f2cb8bc293fd8f777ecd04ddf9c2432","target":"record","created_at":"2026-05-18T02:17:24Z","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":"e0ebdebc8713ace5a3b6a801beb5f3902a3905b8687ed2d1ecb5128cd0e22a3f","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-08T13:32:08Z","title_canon_sha256":"e6c67f2f8f050b20578bd872e2c79549bf1e088bfa586004c7474c65e590af06"},"schema_version":"1.0","source":{"id":"1407.2075","kind":"arxiv","version":2}},"canonical_sha256":"e44dd171284548e0f1d191bde6f7f66c5fe36a654d86f96c8b574994f465158c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e44dd171284548e0f1d191bde6f7f66c5fe36a654d86f96c8b574994f465158c","first_computed_at":"2026-05-18T02:17:24.583403Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:17:24.583403Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OgzZm/f0CtesUYcxA4PIz73d9RiN4BK+Xs9N/sgT1JLglPLp4VEvB2c623zStctZFP/vRccvJIuRQvmHcuF8DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:17:24.584122Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.2075","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:003f5da0a8cb1d49998a1d8d155c0c112f2cb8bc293fd8f777ecd04ddf9c2432","sha256:ee6d4601a4fcfaf69b9eba85ec85cc33812cc1af15824604b55172fa32846ee0"],"state_sha256":"5d3dc668e070739e3b6133469cf3e994e038811162fd4b8f8ff1d07782b94f5c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jdE739BiBVt7pjliNoeT9dXck7RTuMjcZDoJ4r51kPb08jCX6sUbPaLK+UqeT24H3TDg8FR/AgHePcu/FkuHBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T17:00:02.822070Z","bundle_sha256":"33c247fb357b43db3cb801a11d53ddbbd78b809a22b26443380ea49608c9b868"}}