{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:VAKOEHJY5DR73CZ65DHUGPMWA4","short_pith_number":"pith:VAKOEHJY","canonical_record":{"source":{"id":"1605.08655","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-05-27T14:23:22Z","cross_cats_sorted":[],"title_canon_sha256":"bfd60017f3170960820ca0a4a76f5a08a92753b3588a12a5229df1663ed615d9","abstract_canon_sha256":"c91f539becb6bfb5564c3330312c1c0f05f749460b1f5370ca700be97a25ad8a"},"schema_version":"1.0"},"canonical_sha256":"a814e21d38e8e3fd8b3ee8cf433d960711775037beea2bb10e2842ab711846c0","source":{"kind":"arxiv","id":"1605.08655","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.08655","created_at":"2026-05-18T01:08:16Z"},{"alias_kind":"arxiv_version","alias_value":"1605.08655v1","created_at":"2026-05-18T01:08:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.08655","created_at":"2026-05-18T01:08:16Z"},{"alias_kind":"pith_short_12","alias_value":"VAKOEHJY5DR7","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VAKOEHJY5DR73CZ6","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VAKOEHJY","created_at":"2026-05-18T12:30:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:VAKOEHJY5DR73CZ65DHUGPMWA4","target":"record","payload":{"canonical_record":{"source":{"id":"1605.08655","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-05-27T14:23:22Z","cross_cats_sorted":[],"title_canon_sha256":"bfd60017f3170960820ca0a4a76f5a08a92753b3588a12a5229df1663ed615d9","abstract_canon_sha256":"c91f539becb6bfb5564c3330312c1c0f05f749460b1f5370ca700be97a25ad8a"},"schema_version":"1.0"},"canonical_sha256":"a814e21d38e8e3fd8b3ee8cf433d960711775037beea2bb10e2842ab711846c0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:08:16.826707Z","signature_b64":"LWjsjxfdG2VBYTOv6L/eDF3wYrniLVK0Mx99KeeAdoS08EhNbUCWtSsHqrN5J9Tjkfneq3chANeEotMnrhHRCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a814e21d38e8e3fd8b3ee8cf433d960711775037beea2bb10e2842ab711846c0","last_reissued_at":"2026-05-18T01:08:16.825969Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:08:16.825969Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.08655","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":"2026-05-18T01:08:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rxnzFYvLXNbxZgrGtDQ44mPY+xgHBt4iqVsGiJH6RL3VRAQRtiR5joVdZP6HBaE6HS38wuz4Al8nBePn5doOBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T04:56:54.204693Z"},"content_sha256":"cef7699d6f5cece16ea761b90dcb2d9708c3389d7a9915fc9df5eaed65dda5da","schema_version":"1.0","event_id":"sha256:cef7699d6f5cece16ea761b90dcb2d9708c3389d7a9915fc9df5eaed65dda5da"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:VAKOEHJY5DR73CZ65DHUGPMWA4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Truncated Wigner function theory of coherent Ising machines based on degenerate optical parametric oscillator network","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Daiki Maruo, Shoko Utsunomiya, Yoshihisa Yamamoto","submitted_at":"2016-05-27T14:23:22Z","abstract_excerpt":"We present the quantum theory of coherent Ising machines based on networks of degenerate optical parametric oscillators (DOPOs).\n  In a simple model consisting of two coupled DOPOs, both positive-$P$ representation and truncated Wigner representation predict quantum correlation and inseparability between the two DOPOs in spite of the open-dissipative nature of the system.\n  Here, we apply the truncated Wigner representation method to coherent Ising machines with thermal, vacuum, and squeezed reservoir fields. We find that the probability of finding the ground state of a one-dimensional Ising m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.08655","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":"2026-05-18T01:08:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"abogNRkLhRcZjPrqkNzo1kGluBU/wdHA4f7lMjeh3di+2wU42vNufR3dokQk587Yz+JnICvsOnKCr19FA3loAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T04:56:54.205040Z"},"content_sha256":"bb64cd82c7336f671735debf02806c85d72b4f6c1033d5c7b321b1124a557db3","schema_version":"1.0","event_id":"sha256:bb64cd82c7336f671735debf02806c85d72b4f6c1033d5c7b321b1124a557db3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VAKOEHJY5DR73CZ65DHUGPMWA4/bundle.json","state_url":"https://pith.science/pith/VAKOEHJY5DR73CZ65DHUGPMWA4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VAKOEHJY5DR73CZ65DHUGPMWA4/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":"2026-05-31T04:56:54Z","links":{"resolver":"https://pith.science/pith/VAKOEHJY5DR73CZ65DHUGPMWA4","bundle":"https://pith.science/pith/VAKOEHJY5DR73CZ65DHUGPMWA4/bundle.json","state":"https://pith.science/pith/VAKOEHJY5DR73CZ65DHUGPMWA4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VAKOEHJY5DR73CZ65DHUGPMWA4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:VAKOEHJY5DR73CZ65DHUGPMWA4","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":"c91f539becb6bfb5564c3330312c1c0f05f749460b1f5370ca700be97a25ad8a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-05-27T14:23:22Z","title_canon_sha256":"bfd60017f3170960820ca0a4a76f5a08a92753b3588a12a5229df1663ed615d9"},"schema_version":"1.0","source":{"id":"1605.08655","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.08655","created_at":"2026-05-18T01:08:16Z"},{"alias_kind":"arxiv_version","alias_value":"1605.08655v1","created_at":"2026-05-18T01:08:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.08655","created_at":"2026-05-18T01:08:16Z"},{"alias_kind":"pith_short_12","alias_value":"VAKOEHJY5DR7","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VAKOEHJY5DR73CZ6","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VAKOEHJY","created_at":"2026-05-18T12:30:48Z"}],"graph_snapshots":[{"event_id":"sha256:bb64cd82c7336f671735debf02806c85d72b4f6c1033d5c7b321b1124a557db3","target":"graph","created_at":"2026-05-18T01:08:16Z","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 present the quantum theory of coherent Ising machines based on networks of degenerate optical parametric oscillators (DOPOs).\n  In a simple model consisting of two coupled DOPOs, both positive-$P$ representation and truncated Wigner representation predict quantum correlation and inseparability between the two DOPOs in spite of the open-dissipative nature of the system.\n  Here, we apply the truncated Wigner representation method to coherent Ising machines with thermal, vacuum, and squeezed reservoir fields. We find that the probability of finding the ground state of a one-dimensional Ising m","authors_text":"Daiki Maruo, Shoko Utsunomiya, Yoshihisa Yamamoto","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-05-27T14:23:22Z","title":"Truncated Wigner function theory of coherent Ising machines based on degenerate optical parametric oscillator network"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.08655","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:cef7699d6f5cece16ea761b90dcb2d9708c3389d7a9915fc9df5eaed65dda5da","target":"record","created_at":"2026-05-18T01:08:16Z","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":"c91f539becb6bfb5564c3330312c1c0f05f749460b1f5370ca700be97a25ad8a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-05-27T14:23:22Z","title_canon_sha256":"bfd60017f3170960820ca0a4a76f5a08a92753b3588a12a5229df1663ed615d9"},"schema_version":"1.0","source":{"id":"1605.08655","kind":"arxiv","version":1}},"canonical_sha256":"a814e21d38e8e3fd8b3ee8cf433d960711775037beea2bb10e2842ab711846c0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a814e21d38e8e3fd8b3ee8cf433d960711775037beea2bb10e2842ab711846c0","first_computed_at":"2026-05-18T01:08:16.825969Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:08:16.825969Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LWjsjxfdG2VBYTOv6L/eDF3wYrniLVK0Mx99KeeAdoS08EhNbUCWtSsHqrN5J9Tjkfneq3chANeEotMnrhHRCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:08:16.826707Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.08655","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cef7699d6f5cece16ea761b90dcb2d9708c3389d7a9915fc9df5eaed65dda5da","sha256:bb64cd82c7336f671735debf02806c85d72b4f6c1033d5c7b321b1124a557db3"],"state_sha256":"86a78302a5a0e87c73ca0f2706048abe3fb38e406656f13de8c3c28ccda66ed7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rIbCPQeQTztT+IMsrMMSsUE78hZbf+KjQa1HaYOvcqrSZKp7WXfkj13076AkDRMfRCt9izmPIymxlbm2gsZRBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T04:56:54.207111Z","bundle_sha256":"96a0b79a748f120fcc96d276a16f1fea2c7205db608ab682e4eac1b8654bfcb6"}}