{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:4TMUBWHS7LUMMCGKFKR66G7RJA","short_pith_number":"pith:4TMUBWHS","canonical_record":{"source":{"id":"1702.05110","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-02-16T19:08:34Z","cross_cats_sorted":[],"title_canon_sha256":"a62488f1d6df58278294fc61fcaae0aa0bcbd0ff8c7648ae4b6e4039ad2e2946","abstract_canon_sha256":"5997addc123c3f7fe2a8ac49c8f262706d9f815181ea5545df1692c3eea05de2"},"schema_version":"1.0"},"canonical_sha256":"e4d940d8f2fae8c608ca2aa3ef1bf1483ceacfe8af6d21d19a5c4fe6a4667229","source":{"kind":"arxiv","id":"1702.05110","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.05110","created_at":"2026-05-18T00:27:46Z"},{"alias_kind":"arxiv_version","alias_value":"1702.05110v1","created_at":"2026-05-18T00:27:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.05110","created_at":"2026-05-18T00:27:46Z"},{"alias_kind":"pith_short_12","alias_value":"4TMUBWHS7LUM","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_16","alias_value":"4TMUBWHS7LUMMCGK","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_8","alias_value":"4TMUBWHS","created_at":"2026-05-18T12:31:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:4TMUBWHS7LUMMCGKFKR66G7RJA","target":"record","payload":{"canonical_record":{"source":{"id":"1702.05110","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-02-16T19:08:34Z","cross_cats_sorted":[],"title_canon_sha256":"a62488f1d6df58278294fc61fcaae0aa0bcbd0ff8c7648ae4b6e4039ad2e2946","abstract_canon_sha256":"5997addc123c3f7fe2a8ac49c8f262706d9f815181ea5545df1692c3eea05de2"},"schema_version":"1.0"},"canonical_sha256":"e4d940d8f2fae8c608ca2aa3ef1bf1483ceacfe8af6d21d19a5c4fe6a4667229","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:27:46.989826Z","signature_b64":"CQX+kHYNan3ux0AGjc2IXSV5Y1eB0ba686dzeq7vh8DDfL+sMEFuTxv6kjTywWcWrIabnPSlBp80lraxXgXhDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e4d940d8f2fae8c608ca2aa3ef1bf1483ceacfe8af6d21d19a5c4fe6a4667229","last_reissued_at":"2026-05-18T00:27:46.989450Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:27:46.989450Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.05110","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":"2026-05-18T00:27:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"08Utt+Q8q0pmzlTDGgFrxBBJohTrXM1hShjZj+cUK8zesmr4cE2opFTpGEyt057k9peFQGSvncXyn9lpztBDCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T16:09:06.149746Z"},"content_sha256":"13b0b0c1029e9e251def1483a17cec9fb1daf945fe69a3a625126a7bc1063854","schema_version":"1.0","event_id":"sha256:13b0b0c1029e9e251def1483a17cec9fb1daf945fe69a3a625126a7bc1063854"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:4TMUBWHS7LUMMCGKFKR66G7RJA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detecting Gaussian entanglement via extractable work","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Marco Barbieri, Marco G. Genoni, Matteo Brunelli, Mauro Paternostro","submitted_at":"2017-02-16T19:08:34Z","abstract_excerpt":"We show how the presence of entanglement in a bipartite Gaussian state can be detected by the amount of work extracted by a continuos variable Szilard-like device, where the bipartite state serves as the working medium of the engine. We provide an expression for the work extracted in such a process and specialize it to the case of Gaussian states. The extractable work provides a sufficient condition to witness entanglement in generic two-mode states, becoming also necessary for squeezed thermal states. We extend the protocol to tripartite Gaussian states, and show that the full structure of in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.05110","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":"2026-05-18T00:27:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DynuWalgzmbwBp6GTh4VXXIbSNThuFicawMnwFlkO5UlAdyC0qJ9HsUGlSawz6imzpEUNljJfwSRaQ98+dEgBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T16:09:06.150094Z"},"content_sha256":"e2c6757a9a65c65b6e066a149f118197e6b3eea4772012fb4b0d016cd54b9273","schema_version":"1.0","event_id":"sha256:e2c6757a9a65c65b6e066a149f118197e6b3eea4772012fb4b0d016cd54b9273"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4TMUBWHS7LUMMCGKFKR66G7RJA/bundle.json","state_url":"https://pith.science/pith/4TMUBWHS7LUMMCGKFKR66G7RJA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4TMUBWHS7LUMMCGKFKR66G7RJA/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":"2026-06-03T16:09:06Z","links":{"resolver":"https://pith.science/pith/4TMUBWHS7LUMMCGKFKR66G7RJA","bundle":"https://pith.science/pith/4TMUBWHS7LUMMCGKFKR66G7RJA/bundle.json","state":"https://pith.science/pith/4TMUBWHS7LUMMCGKFKR66G7RJA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4TMUBWHS7LUMMCGKFKR66G7RJA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:4TMUBWHS7LUMMCGKFKR66G7RJA","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":"5997addc123c3f7fe2a8ac49c8f262706d9f815181ea5545df1692c3eea05de2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-02-16T19:08:34Z","title_canon_sha256":"a62488f1d6df58278294fc61fcaae0aa0bcbd0ff8c7648ae4b6e4039ad2e2946"},"schema_version":"1.0","source":{"id":"1702.05110","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.05110","created_at":"2026-05-18T00:27:46Z"},{"alias_kind":"arxiv_version","alias_value":"1702.05110v1","created_at":"2026-05-18T00:27:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.05110","created_at":"2026-05-18T00:27:46Z"},{"alias_kind":"pith_short_12","alias_value":"4TMUBWHS7LUM","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_16","alias_value":"4TMUBWHS7LUMMCGK","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_8","alias_value":"4TMUBWHS","created_at":"2026-05-18T12:31:00Z"}],"graph_snapshots":[{"event_id":"sha256:e2c6757a9a65c65b6e066a149f118197e6b3eea4772012fb4b0d016cd54b9273","target":"graph","created_at":"2026-05-18T00:27:46Z","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 show how the presence of entanglement in a bipartite Gaussian state can be detected by the amount of work extracted by a continuos variable Szilard-like device, where the bipartite state serves as the working medium of the engine. We provide an expression for the work extracted in such a process and specialize it to the case of Gaussian states. The extractable work provides a sufficient condition to witness entanglement in generic two-mode states, becoming also necessary for squeezed thermal states. We extend the protocol to tripartite Gaussian states, and show that the full structure of in","authors_text":"Marco Barbieri, Marco G. Genoni, Matteo Brunelli, Mauro Paternostro","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-02-16T19:08:34Z","title":"Detecting Gaussian entanglement via extractable work"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.05110","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":"sha256:13b0b0c1029e9e251def1483a17cec9fb1daf945fe69a3a625126a7bc1063854","target":"record","created_at":"2026-05-18T00:27:46Z","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":"5997addc123c3f7fe2a8ac49c8f262706d9f815181ea5545df1692c3eea05de2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-02-16T19:08:34Z","title_canon_sha256":"a62488f1d6df58278294fc61fcaae0aa0bcbd0ff8c7648ae4b6e4039ad2e2946"},"schema_version":"1.0","source":{"id":"1702.05110","kind":"arxiv","version":1}},"canonical_sha256":"e4d940d8f2fae8c608ca2aa3ef1bf1483ceacfe8af6d21d19a5c4fe6a4667229","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e4d940d8f2fae8c608ca2aa3ef1bf1483ceacfe8af6d21d19a5c4fe6a4667229","first_computed_at":"2026-05-18T00:27:46.989450Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:27:46.989450Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CQX+kHYNan3ux0AGjc2IXSV5Y1eB0ba686dzeq7vh8DDfL+sMEFuTxv6kjTywWcWrIabnPSlBp80lraxXgXhDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:27:46.989826Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.05110","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:13b0b0c1029e9e251def1483a17cec9fb1daf945fe69a3a625126a7bc1063854","sha256:e2c6757a9a65c65b6e066a149f118197e6b3eea4772012fb4b0d016cd54b9273"],"state_sha256":"cba933ba1d6362a5c12da6e0ab1c233e88e79c4c1175ec81c7c9fe50e18c8dd5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VX6W09AnAfwPCn+EGbrZ6puVLOsDi23Nw4khcy7p+nJdXYgiaTqy3e1ATSaChDJoKkTvYy2TlzU3WvFEZ8eTAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T16:09:06.152081Z","bundle_sha256":"b1781dd73d3c91cd2fe68795cf954625950bd831fb62011aa31eeabc6873f7e2"}}