{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:62SCZHVZRG2RC4DOJI3W7T6UOD","short_pith_number":"pith:62SCZHVZ","canonical_record":{"source":{"id":"1512.05645","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2015-12-17T15:51:11Z","cross_cats_sorted":[],"title_canon_sha256":"099d0dc4df345d7cd4918bf7a7a5265fbabf3c459b0d4670bc91492de97a045a","abstract_canon_sha256":"187916e7ee018dddd87b050d24b8f607888d5db2b80c1291d2203cb256eee07a"},"schema_version":"1.0"},"canonical_sha256":"f6a42c9eb989b511706e4a376fcfd470e290ce7a395da114dd06ebb9cf9121e9","source":{"kind":"arxiv","id":"1512.05645","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.05645","created_at":"2026-05-18T01:17:36Z"},{"alias_kind":"arxiv_version","alias_value":"1512.05645v1","created_at":"2026-05-18T01:17:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.05645","created_at":"2026-05-18T01:17:36Z"},{"alias_kind":"pith_short_12","alias_value":"62SCZHVZRG2R","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"62SCZHVZRG2RC4DO","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"62SCZHVZ","created_at":"2026-05-18T12:29:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:62SCZHVZRG2RC4DOJI3W7T6UOD","target":"record","payload":{"canonical_record":{"source":{"id":"1512.05645","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2015-12-17T15:51:11Z","cross_cats_sorted":[],"title_canon_sha256":"099d0dc4df345d7cd4918bf7a7a5265fbabf3c459b0d4670bc91492de97a045a","abstract_canon_sha256":"187916e7ee018dddd87b050d24b8f607888d5db2b80c1291d2203cb256eee07a"},"schema_version":"1.0"},"canonical_sha256":"f6a42c9eb989b511706e4a376fcfd470e290ce7a395da114dd06ebb9cf9121e9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:17:36.933008Z","signature_b64":"qP9RrnxPexNZKS0XwAo8X37G/Yi+f3HsJaCzORO/kFC4EsiyZ8nKISQKijU+gl9F73R9z1dyR5vpkzWJ0CRIAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f6a42c9eb989b511706e4a376fcfd470e290ce7a395da114dd06ebb9cf9121e9","last_reissued_at":"2026-05-18T01:17:36.932359Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:17:36.932359Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.05645","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":"2026-05-18T01:17:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vFpER2vcFTnlV5DPK7F2lyE0wwkKIK1qkyp1al747gCA8cRnj9QEnppQ26ffBNUViAvczQB0P6nnC2l4USBiDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T19:05:51.462958Z"},"content_sha256":"99c3438124bd8d5ded585c52e79fef3041d2a22c40d75b9535e95f518e3e0d03","schema_version":"1.0","event_id":"sha256:99c3438124bd8d5ded585c52e79fef3041d2a22c40d75b9535e95f518e3e0d03"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:62SCZHVZRG2RC4DOJI3W7T6UOD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Parametric Excitation and Squeezing in a Many-Body Spin System","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.quant-gas","authors_text":"B.A. Robbins, B.J. Land, C.D. Hamley, M. Anquez, M.S. Chapman, T.M. Hoang, X.Y. Yang","submitted_at":"2015-12-17T15:51:11Z","abstract_excerpt":"We demonstrate a new method to coherently excite and control the quantum spin states of an atomic Bose gas using parametric excitation of the collective spin by time varying the relative strength of the Zeeman and spin-dependent collisional interaction energies at multiples of the natural frequency of the system. Compared to the usual single-particle quantum control techniques used to excite atomic spins (e.g. Rabi oscillations using rf or microwave fields), the method demonstrated here is intrinsically many-body, requiring inter-particle interactions. While parametric excitation of a classica"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.05645","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":"2026-05-18T01:17:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"65huT/jEaH+8T8bhwZzWHVjPcChngzg7t336SlhIOzubwOZ6BJ3ZfcflI4r+GTvwmsBqxRJWnY108b6821gABQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T19:05:51.463342Z"},"content_sha256":"e2ee2fe2aeef5e41e5b1850fecb52395dd288f0c5a2256da4661a3ceafb1cd7a","schema_version":"1.0","event_id":"sha256:e2ee2fe2aeef5e41e5b1850fecb52395dd288f0c5a2256da4661a3ceafb1cd7a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/62SCZHVZRG2RC4DOJI3W7T6UOD/bundle.json","state_url":"https://pith.science/pith/62SCZHVZRG2RC4DOJI3W7T6UOD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/62SCZHVZRG2RC4DOJI3W7T6UOD/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":"2026-06-09T19:05:51Z","links":{"resolver":"https://pith.science/pith/62SCZHVZRG2RC4DOJI3W7T6UOD","bundle":"https://pith.science/pith/62SCZHVZRG2RC4DOJI3W7T6UOD/bundle.json","state":"https://pith.science/pith/62SCZHVZRG2RC4DOJI3W7T6UOD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/62SCZHVZRG2RC4DOJI3W7T6UOD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:62SCZHVZRG2RC4DOJI3W7T6UOD","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":"187916e7ee018dddd87b050d24b8f607888d5db2b80c1291d2203cb256eee07a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2015-12-17T15:51:11Z","title_canon_sha256":"099d0dc4df345d7cd4918bf7a7a5265fbabf3c459b0d4670bc91492de97a045a"},"schema_version":"1.0","source":{"id":"1512.05645","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.05645","created_at":"2026-05-18T01:17:36Z"},{"alias_kind":"arxiv_version","alias_value":"1512.05645v1","created_at":"2026-05-18T01:17:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.05645","created_at":"2026-05-18T01:17:36Z"},{"alias_kind":"pith_short_12","alias_value":"62SCZHVZRG2R","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"62SCZHVZRG2RC4DO","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"62SCZHVZ","created_at":"2026-05-18T12:29:07Z"}],"graph_snapshots":[{"event_id":"sha256:e2ee2fe2aeef5e41e5b1850fecb52395dd288f0c5a2256da4661a3ceafb1cd7a","target":"graph","created_at":"2026-05-18T01:17:36Z","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 demonstrate a new method to coherently excite and control the quantum spin states of an atomic Bose gas using parametric excitation of the collective spin by time varying the relative strength of the Zeeman and spin-dependent collisional interaction energies at multiples of the natural frequency of the system. Compared to the usual single-particle quantum control techniques used to excite atomic spins (e.g. Rabi oscillations using rf or microwave fields), the method demonstrated here is intrinsically many-body, requiring inter-particle interactions. While parametric excitation of a classica","authors_text":"B.A. Robbins, B.J. Land, C.D. Hamley, M. Anquez, M.S. Chapman, T.M. Hoang, X.Y. Yang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2015-12-17T15:51:11Z","title":"Parametric Excitation and Squeezing in a Many-Body Spin System"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.05645","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":"sha256:99c3438124bd8d5ded585c52e79fef3041d2a22c40d75b9535e95f518e3e0d03","target":"record","created_at":"2026-05-18T01:17:36Z","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":"187916e7ee018dddd87b050d24b8f607888d5db2b80c1291d2203cb256eee07a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2015-12-17T15:51:11Z","title_canon_sha256":"099d0dc4df345d7cd4918bf7a7a5265fbabf3c459b0d4670bc91492de97a045a"},"schema_version":"1.0","source":{"id":"1512.05645","kind":"arxiv","version":1}},"canonical_sha256":"f6a42c9eb989b511706e4a376fcfd470e290ce7a395da114dd06ebb9cf9121e9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f6a42c9eb989b511706e4a376fcfd470e290ce7a395da114dd06ebb9cf9121e9","first_computed_at":"2026-05-18T01:17:36.932359Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:17:36.932359Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qP9RrnxPexNZKS0XwAo8X37G/Yi+f3HsJaCzORO/kFC4EsiyZ8nKISQKijU+gl9F73R9z1dyR5vpkzWJ0CRIAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:17:36.933008Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.05645","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:99c3438124bd8d5ded585c52e79fef3041d2a22c40d75b9535e95f518e3e0d03","sha256:e2ee2fe2aeef5e41e5b1850fecb52395dd288f0c5a2256da4661a3ceafb1cd7a"],"state_sha256":"f01b6fa5296df2d035581b96a2fa484eb3b341da0e081529a2b34088ad911324"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oa9bY5C8tV38/HPmCI3WvravCkM6obnor9y8WQCTSgRZnFSeEAwDsKMKqktx3Izfh6UbXbI5FJVfxMbTOj2SCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T19:05:51.465380Z","bundle_sha256":"4c1f8eca11684ab6ca4a543f2b7398b1a815eb3904efc7a53da7f75fa5a16a15"}}