{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:ROQYTHNGEATCDJZ7FUTX7PZDX4","short_pith_number":"pith:ROQYTHNG","canonical_record":{"source":{"id":"1707.09396","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-07-28T20:02:35Z","cross_cats_sorted":[],"title_canon_sha256":"676cfba74dfb159b1cb5ca4768756d9e518ab8598eb6c36152d1d71c8e52405b","abstract_canon_sha256":"0c67007d95daa11ff4e66876af04a7ae309e5eecf824a3402b4dff942a88545b"},"schema_version":"1.0"},"canonical_sha256":"8ba1899da6202621a73f2d277fbf23bf250eabbac89f18eeaed21a5c223cd3c9","source":{"kind":"arxiv","id":"1707.09396","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.09396","created_at":"2026-05-18T00:31:40Z"},{"alias_kind":"arxiv_version","alias_value":"1707.09396v2","created_at":"2026-05-18T00:31:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.09396","created_at":"2026-05-18T00:31:40Z"},{"alias_kind":"pith_short_12","alias_value":"ROQYTHNGEATC","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"ROQYTHNGEATCDJZ7","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"ROQYTHNG","created_at":"2026-05-18T12:31:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:ROQYTHNGEATCDJZ7FUTX7PZDX4","target":"record","payload":{"canonical_record":{"source":{"id":"1707.09396","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-07-28T20:02:35Z","cross_cats_sorted":[],"title_canon_sha256":"676cfba74dfb159b1cb5ca4768756d9e518ab8598eb6c36152d1d71c8e52405b","abstract_canon_sha256":"0c67007d95daa11ff4e66876af04a7ae309e5eecf824a3402b4dff942a88545b"},"schema_version":"1.0"},"canonical_sha256":"8ba1899da6202621a73f2d277fbf23bf250eabbac89f18eeaed21a5c223cd3c9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:31:40.300914Z","signature_b64":"/AU5TmonuxV/6YOFxzs53GZtv4AO4LtxKQVe3P1UGymwFIHHOME3cbcsHgdHQ9VIz4j/g/OecsasU3YgQFFCBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8ba1899da6202621a73f2d277fbf23bf250eabbac89f18eeaed21a5c223cd3c9","last_reissued_at":"2026-05-18T00:31:40.300540Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:31:40.300540Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.09396","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":"2026-05-18T00:31:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1HJk68WbxcueYl7TDdx4p5LUyqzNe5ohARKPvvWu8OMM6DwqITQxvJohhlgAMEUM5594Xq5OAHHEo/+4Pr6xDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T15:21:13.539811Z"},"content_sha256":"b2db8198609bb9a87f2ce73c359aa0a658fec26b25db9ab108d02ef571cb52ba","schema_version":"1.0","event_id":"sha256:b2db8198609bb9a87f2ce73c359aa0a658fec26b25db9ab108d02ef571cb52ba"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:ROQYTHNGEATCDJZ7FUTX7PZDX4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Sequentially generated entanglement, macroscopicity and squeezing in a spin chain","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Klaus M{\\o}lmer, Tahereh Abad, Vahid Karimipour","submitted_at":"2017-07-28T20:02:35Z","abstract_excerpt":"We study quantum states generated by a sequence of nearest neighbor bipartite entangling operations along a one-dimensional chain of spin qubits. After a single sweep of such a set of operations, the system is effectively described by a matrix product state (MPS) with the same virtual dimension as the spin qubits. We employ the explicit form of the MPS to calculate expectation values and two-site correlation functions of local observables, and we use the results to study fluctuations of collective observables. Through the so-called macroscopicity and the squeezing properties of the collective "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.09396","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":"2026-05-18T00:31:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VpEDULii2mZv9DMvwr8ywtwnuSVMIvAgj2+uopDf2LYp1Nuu7+DAtoZCYe8ET9Y636nYTbaXoloAd/+CyW3KAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T15:21:13.540309Z"},"content_sha256":"ea9ade552509f098fd102e9b6d35a028621292e139d9646c8acc60d66c2983f2","schema_version":"1.0","event_id":"sha256:ea9ade552509f098fd102e9b6d35a028621292e139d9646c8acc60d66c2983f2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ROQYTHNGEATCDJZ7FUTX7PZDX4/bundle.json","state_url":"https://pith.science/pith/ROQYTHNGEATCDJZ7FUTX7PZDX4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ROQYTHNGEATCDJZ7FUTX7PZDX4/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":"2026-05-26T15:21:13Z","links":{"resolver":"https://pith.science/pith/ROQYTHNGEATCDJZ7FUTX7PZDX4","bundle":"https://pith.science/pith/ROQYTHNGEATCDJZ7FUTX7PZDX4/bundle.json","state":"https://pith.science/pith/ROQYTHNGEATCDJZ7FUTX7PZDX4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ROQYTHNGEATCDJZ7FUTX7PZDX4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:ROQYTHNGEATCDJZ7FUTX7PZDX4","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":"0c67007d95daa11ff4e66876af04a7ae309e5eecf824a3402b4dff942a88545b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-07-28T20:02:35Z","title_canon_sha256":"676cfba74dfb159b1cb5ca4768756d9e518ab8598eb6c36152d1d71c8e52405b"},"schema_version":"1.0","source":{"id":"1707.09396","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.09396","created_at":"2026-05-18T00:31:40Z"},{"alias_kind":"arxiv_version","alias_value":"1707.09396v2","created_at":"2026-05-18T00:31:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.09396","created_at":"2026-05-18T00:31:40Z"},{"alias_kind":"pith_short_12","alias_value":"ROQYTHNGEATC","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"ROQYTHNGEATCDJZ7","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"ROQYTHNG","created_at":"2026-05-18T12:31:39Z"}],"graph_snapshots":[{"event_id":"sha256:ea9ade552509f098fd102e9b6d35a028621292e139d9646c8acc60d66c2983f2","target":"graph","created_at":"2026-05-18T00:31:40Z","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 quantum states generated by a sequence of nearest neighbor bipartite entangling operations along a one-dimensional chain of spin qubits. After a single sweep of such a set of operations, the system is effectively described by a matrix product state (MPS) with the same virtual dimension as the spin qubits. We employ the explicit form of the MPS to calculate expectation values and two-site correlation functions of local observables, and we use the results to study fluctuations of collective observables. Through the so-called macroscopicity and the squeezing properties of the collective ","authors_text":"Klaus M{\\o}lmer, Tahereh Abad, Vahid Karimipour","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-07-28T20:02:35Z","title":"Sequentially generated entanglement, macroscopicity and squeezing in a spin chain"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.09396","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:b2db8198609bb9a87f2ce73c359aa0a658fec26b25db9ab108d02ef571cb52ba","target":"record","created_at":"2026-05-18T00:31:40Z","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":"0c67007d95daa11ff4e66876af04a7ae309e5eecf824a3402b4dff942a88545b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-07-28T20:02:35Z","title_canon_sha256":"676cfba74dfb159b1cb5ca4768756d9e518ab8598eb6c36152d1d71c8e52405b"},"schema_version":"1.0","source":{"id":"1707.09396","kind":"arxiv","version":2}},"canonical_sha256":"8ba1899da6202621a73f2d277fbf23bf250eabbac89f18eeaed21a5c223cd3c9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8ba1899da6202621a73f2d277fbf23bf250eabbac89f18eeaed21a5c223cd3c9","first_computed_at":"2026-05-18T00:31:40.300540Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:31:40.300540Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/AU5TmonuxV/6YOFxzs53GZtv4AO4LtxKQVe3P1UGymwFIHHOME3cbcsHgdHQ9VIz4j/g/OecsasU3YgQFFCBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:31:40.300914Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.09396","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b2db8198609bb9a87f2ce73c359aa0a658fec26b25db9ab108d02ef571cb52ba","sha256:ea9ade552509f098fd102e9b6d35a028621292e139d9646c8acc60d66c2983f2"],"state_sha256":"9637b9795fee211d0d84b049cb1aaa004ab6c5351f0a10953777f68a884e75e1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aRLFcFLXoTuY+EF5kq5iasjYQGj6qNpGf6R/pFgdRZXByy+6NzRQhTvth7yMT6lxy/GtCbZEwu8j7giUMz8/Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T15:21:13.542908Z","bundle_sha256":"3a0ea04795dbc277d523949925d5711432a9cdfad9ce222ec837d1b052403115"}}