{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:EHABXI6J4IXSJOJQQAZMIYZAML","short_pith_number":"pith:EHABXI6J","canonical_record":{"source":{"id":"1306.1011","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2013-06-05T07:43:40Z","cross_cats_sorted":["cond-mat.quant-gas","quant-ph"],"title_canon_sha256":"dbb71cba8933187bc539ec8a93838a0144a1f4b2f236e214fb6aae3a45e5973d","abstract_canon_sha256":"6ad844e1dbae7fee265f0f3286b03a0dc606245ce4eab1d165f8bf83e759a9cc"},"schema_version":"1.0"},"canonical_sha256":"21c01ba3c9e22f24b9308032c4632062ec62c854fdb1a13195a5895362b77265","source":{"kind":"arxiv","id":"1306.1011","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.1011","created_at":"2026-05-18T01:49:32Z"},{"alias_kind":"arxiv_version","alias_value":"1306.1011v1","created_at":"2026-05-18T01:49:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.1011","created_at":"2026-05-18T01:49:32Z"},{"alias_kind":"pith_short_12","alias_value":"EHABXI6J4IXS","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"EHABXI6J4IXSJOJQ","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"EHABXI6J","created_at":"2026-05-18T12:27:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:EHABXI6J4IXSJOJQQAZMIYZAML","target":"record","payload":{"canonical_record":{"source":{"id":"1306.1011","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2013-06-05T07:43:40Z","cross_cats_sorted":["cond-mat.quant-gas","quant-ph"],"title_canon_sha256":"dbb71cba8933187bc539ec8a93838a0144a1f4b2f236e214fb6aae3a45e5973d","abstract_canon_sha256":"6ad844e1dbae7fee265f0f3286b03a0dc606245ce4eab1d165f8bf83e759a9cc"},"schema_version":"1.0"},"canonical_sha256":"21c01ba3c9e22f24b9308032c4632062ec62c854fdb1a13195a5895362b77265","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:49:32.684473Z","signature_b64":"C7LA/qNza+ILLHbaYKs/Az9PUgDR7Lulm6JU6gJqQLmZU/UDwaI1bkiY09+/Kb6DE7pOrA7s0W80U5gZMEC2BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"21c01ba3c9e22f24b9308032c4632062ec62c854fdb1a13195a5895362b77265","last_reissued_at":"2026-05-18T01:49:32.683729Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:49:32.683729Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1306.1011","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":"2026-05-18T01:49:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"22IH9wenXuSo/FQpo/A29Wo0AbwjTiGlXgydYuxvi5IRmTPDWkyPnGqx7ay33RvWNP49ZktXf26yyJv2MzsCCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T06:38:58.924219Z"},"content_sha256":"c816712eb018943cd679db14666cd688ed624c66154795150116111607e273af","schema_version":"1.0","event_id":"sha256:c816712eb018943cd679db14666cd688ed624c66154795150116111607e273af"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:EHABXI6J4IXSJOJQQAZMIYZAML","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spin-Echo-Based Magnetometry with Spinor Bose-Einstein Condensates","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.quant-gas","quant-ph"],"primary_cat":"physics.atom-ph","authors_text":"Hayato Ikeda, Hirosuke Suzuki, Mark Sadgrove, Sawako Sekine, Sho Hasegawa, Takuya Hirano, Yasushi Tomiyama, Yujiro Eto","submitted_at":"2013-06-05T07:43:40Z","abstract_excerpt":"We demonstrate detection of a weak alternate-current magnetic field by application of the spin echo technique to F = 2 Bose-Einstein condensates. A magnetic field sensitivity of 12 pT/Hz^1/2 is attained with the atom number of 5*10^3 at spatial resolution of 99 \\mu m^2. Our observations indicate magnetic field fluctuations synchronous with the power supply line frequency. We show that this noise is greatly suppressed by application of a reverse phase magnetic field. Our technique is useful in order to create a stable magnetic field environment, which is an important requirement for atomic expe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.1011","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":"2026-05-18T01:49:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rCLz0pgg3vKptLkDJla4qJpriqB9RboHS6BZnOVnnzXJ/F3RiMG87Ms2R5+hrpCe2W5SqtvYiALLFnOlwrx7Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T06:38:58.924584Z"},"content_sha256":"2b2e2dad8d026c1e838c5a04140aee59566c8ee88dfee5d4cd4ca907c901c239","schema_version":"1.0","event_id":"sha256:2b2e2dad8d026c1e838c5a04140aee59566c8ee88dfee5d4cd4ca907c901c239"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EHABXI6J4IXSJOJQQAZMIYZAML/bundle.json","state_url":"https://pith.science/pith/EHABXI6J4IXSJOJQQAZMIYZAML/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EHABXI6J4IXSJOJQQAZMIYZAML/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":"2026-06-24T06:38:58Z","links":{"resolver":"https://pith.science/pith/EHABXI6J4IXSJOJQQAZMIYZAML","bundle":"https://pith.science/pith/EHABXI6J4IXSJOJQQAZMIYZAML/bundle.json","state":"https://pith.science/pith/EHABXI6J4IXSJOJQQAZMIYZAML/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EHABXI6J4IXSJOJQQAZMIYZAML/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:EHABXI6J4IXSJOJQQAZMIYZAML","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":"6ad844e1dbae7fee265f0f3286b03a0dc606245ce4eab1d165f8bf83e759a9cc","cross_cats_sorted":["cond-mat.quant-gas","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2013-06-05T07:43:40Z","title_canon_sha256":"dbb71cba8933187bc539ec8a93838a0144a1f4b2f236e214fb6aae3a45e5973d"},"schema_version":"1.0","source":{"id":"1306.1011","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.1011","created_at":"2026-05-18T01:49:32Z"},{"alias_kind":"arxiv_version","alias_value":"1306.1011v1","created_at":"2026-05-18T01:49:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.1011","created_at":"2026-05-18T01:49:32Z"},{"alias_kind":"pith_short_12","alias_value":"EHABXI6J4IXS","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"EHABXI6J4IXSJOJQ","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"EHABXI6J","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:2b2e2dad8d026c1e838c5a04140aee59566c8ee88dfee5d4cd4ca907c901c239","target":"graph","created_at":"2026-05-18T01:49:32Z","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 detection of a weak alternate-current magnetic field by application of the spin echo technique to F = 2 Bose-Einstein condensates. A magnetic field sensitivity of 12 pT/Hz^1/2 is attained with the atom number of 5*10^3 at spatial resolution of 99 \\mu m^2. Our observations indicate magnetic field fluctuations synchronous with the power supply line frequency. We show that this noise is greatly suppressed by application of a reverse phase magnetic field. Our technique is useful in order to create a stable magnetic field environment, which is an important requirement for atomic expe","authors_text":"Hayato Ikeda, Hirosuke Suzuki, Mark Sadgrove, Sawako Sekine, Sho Hasegawa, Takuya Hirano, Yasushi Tomiyama, Yujiro Eto","cross_cats":["cond-mat.quant-gas","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2013-06-05T07:43:40Z","title":"Spin-Echo-Based Magnetometry with Spinor Bose-Einstein Condensates"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.1011","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:c816712eb018943cd679db14666cd688ed624c66154795150116111607e273af","target":"record","created_at":"2026-05-18T01:49:32Z","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":"6ad844e1dbae7fee265f0f3286b03a0dc606245ce4eab1d165f8bf83e759a9cc","cross_cats_sorted":["cond-mat.quant-gas","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2013-06-05T07:43:40Z","title_canon_sha256":"dbb71cba8933187bc539ec8a93838a0144a1f4b2f236e214fb6aae3a45e5973d"},"schema_version":"1.0","source":{"id":"1306.1011","kind":"arxiv","version":1}},"canonical_sha256":"21c01ba3c9e22f24b9308032c4632062ec62c854fdb1a13195a5895362b77265","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"21c01ba3c9e22f24b9308032c4632062ec62c854fdb1a13195a5895362b77265","first_computed_at":"2026-05-18T01:49:32.683729Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:49:32.683729Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"C7LA/qNza+ILLHbaYKs/Az9PUgDR7Lulm6JU6gJqQLmZU/UDwaI1bkiY09+/Kb6DE7pOrA7s0W80U5gZMEC2BA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:49:32.684473Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.1011","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c816712eb018943cd679db14666cd688ed624c66154795150116111607e273af","sha256:2b2e2dad8d026c1e838c5a04140aee59566c8ee88dfee5d4cd4ca907c901c239"],"state_sha256":"73d6e04d58c7ad35cb771cd41d4d2bff58cac15a9ebc841c98e3cb7f8c573641"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j0NaRI1E1AncKiVDcQgYkL1H8pxPYMKHMPbITP1yaEYUFn+ZfRhfzJy8e4iEPDtGyyS5sO3YwdYU/T+wE8GvCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T06:38:58.926553Z","bundle_sha256":"ce56ec7f9dd8c8f3ec34eee6de17d81b234c8c3bc3a002bdd1d41482cda1b38c"}}