{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:QEKKFDC3MC5N4MAPIKPCYIC6EV","short_pith_number":"pith:QEKKFDC3","canonical_record":{"source":{"id":"2605.26458","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2026-05-26T02:12:52Z","cross_cats_sorted":[],"title_canon_sha256":"57eaaabffbc511c6837e94701dc2c61f54c88a4f7483a543e277abd24ec24367","abstract_canon_sha256":"a218adb3878a6c6fdd4f9047ab46722cee228627b9b1c176c0694b8ad5d8a6a8"},"schema_version":"1.0"},"canonical_sha256":"8114a28c5b60bade300f429e2c205e2546639e48e2e96154cf991b35e5322757","source":{"kind":"arxiv","id":"2605.26458","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.26458","created_at":"2026-05-27T01:05:19Z"},{"alias_kind":"arxiv_version","alias_value":"2605.26458v1","created_at":"2026-05-27T01:05:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.26458","created_at":"2026-05-27T01:05:19Z"},{"alias_kind":"pith_short_12","alias_value":"QEKKFDC3MC5N","created_at":"2026-05-27T01:05:19Z"},{"alias_kind":"pith_short_16","alias_value":"QEKKFDC3MC5N4MAP","created_at":"2026-05-27T01:05:19Z"},{"alias_kind":"pith_short_8","alias_value":"QEKKFDC3","created_at":"2026-05-27T01:05:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:QEKKFDC3MC5N4MAPIKPCYIC6EV","target":"record","payload":{"canonical_record":{"source":{"id":"2605.26458","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2026-05-26T02:12:52Z","cross_cats_sorted":[],"title_canon_sha256":"57eaaabffbc511c6837e94701dc2c61f54c88a4f7483a543e277abd24ec24367","abstract_canon_sha256":"a218adb3878a6c6fdd4f9047ab46722cee228627b9b1c176c0694b8ad5d8a6a8"},"schema_version":"1.0"},"canonical_sha256":"8114a28c5b60bade300f429e2c205e2546639e48e2e96154cf991b35e5322757","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-27T01:05:19.093015Z","signature_b64":"4BwgKp1raKF8yQlOpP4cmHqiAxWS2QApSB3cMUPJTV4EfBD0pCkx2wm4kjoSSRuf4rV/jYjOOMX7ajHY4i+8Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8114a28c5b60bade300f429e2c205e2546639e48e2e96154cf991b35e5322757","last_reissued_at":"2026-05-27T01:05:19.092228Z","signature_status":"signed_v1","first_computed_at":"2026-05-27T01:05:19.092228Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2605.26458","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":"2026-05-27T01:05:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DhPKsW1tycN9Ws3Yq2cTquT8mX0KAsUq9naQpGbT5IETB+FDgFSeF8HN2S6kmLn4J9RmmzxBl3WjZY2j2MWRBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T22:12:39.096589Z"},"content_sha256":"c9f516e2676c0ebf98becec24e6b3732103de872ae0bb5e140f42e1021d14e31","schema_version":"1.0","event_id":"sha256:c9f516e2676c0ebf98becec24e6b3732103de872ae0bb5e140f42e1021d14e31"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:QEKKFDC3MC5N4MAPIKPCYIC6EV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Directional Symmetry Breaking of Spherical Active Colloids by Magnetoviscous Coupling","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Kazusa Beppu, Keita Saito, Kohei Yoshinaga, Masato Ito, Takuya Kobayashi, Yasutaka Iwashita, Yusuke T. Maeda, Ziyang Zhou","submitted_at":"2026-05-26T02:12:52Z","abstract_excerpt":"Harnessing active matter requires strategies that break the directional symmetry of self-propelled motion without altering the propulsion mechanism itself. Here, we show that magnetically inert spherical active colloids can be steered through the anisotropic viscous response of a ferrofluid under a uniform magnetic field. Self-propelled Janus colloids exhibit robust cross-field motion transverse to the magnetic field, although the applied magnetic field directly controls neither the particles nor their propulsion speed. Quantitative measurements reveal an emergent reorientation torque that gro"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.26458","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.26458/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-05-27T01:05:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nLkji7eJvaasooONtwSzF5QRHnxX/hOYwO7Gd1rlKu5mDlDypMuJCR/7YLngIz93karzNjn1BBnXNikdccJpAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T22:12:39.097284Z"},"content_sha256":"c2df4ba82e90012d38c90d5daa096224df748cc60d8fde96f1779005af21ef9a","schema_version":"1.0","event_id":"sha256:c2df4ba82e90012d38c90d5daa096224df748cc60d8fde96f1779005af21ef9a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QEKKFDC3MC5N4MAPIKPCYIC6EV/bundle.json","state_url":"https://pith.science/pith/QEKKFDC3MC5N4MAPIKPCYIC6EV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QEKKFDC3MC5N4MAPIKPCYIC6EV/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":"2026-05-29T22:12:39Z","links":{"resolver":"https://pith.science/pith/QEKKFDC3MC5N4MAPIKPCYIC6EV","bundle":"https://pith.science/pith/QEKKFDC3MC5N4MAPIKPCYIC6EV/bundle.json","state":"https://pith.science/pith/QEKKFDC3MC5N4MAPIKPCYIC6EV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QEKKFDC3MC5N4MAPIKPCYIC6EV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:QEKKFDC3MC5N4MAPIKPCYIC6EV","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":"a218adb3878a6c6fdd4f9047ab46722cee228627b9b1c176c0694b8ad5d8a6a8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2026-05-26T02:12:52Z","title_canon_sha256":"57eaaabffbc511c6837e94701dc2c61f54c88a4f7483a543e277abd24ec24367"},"schema_version":"1.0","source":{"id":"2605.26458","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.26458","created_at":"2026-05-27T01:05:19Z"},{"alias_kind":"arxiv_version","alias_value":"2605.26458v1","created_at":"2026-05-27T01:05:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.26458","created_at":"2026-05-27T01:05:19Z"},{"alias_kind":"pith_short_12","alias_value":"QEKKFDC3MC5N","created_at":"2026-05-27T01:05:19Z"},{"alias_kind":"pith_short_16","alias_value":"QEKKFDC3MC5N4MAP","created_at":"2026-05-27T01:05:19Z"},{"alias_kind":"pith_short_8","alias_value":"QEKKFDC3","created_at":"2026-05-27T01:05:19Z"}],"graph_snapshots":[{"event_id":"sha256:c2df4ba82e90012d38c90d5daa096224df748cc60d8fde96f1779005af21ef9a","target":"graph","created_at":"2026-05-27T01:05:19Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2605.26458/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Harnessing active matter requires strategies that break the directional symmetry of self-propelled motion without altering the propulsion mechanism itself. Here, we show that magnetically inert spherical active colloids can be steered through the anisotropic viscous response of a ferrofluid under a uniform magnetic field. Self-propelled Janus colloids exhibit robust cross-field motion transverse to the magnetic field, although the applied magnetic field directly controls neither the particles nor their propulsion speed. Quantitative measurements reveal an emergent reorientation torque that gro","authors_text":"Kazusa Beppu, Keita Saito, Kohei Yoshinaga, Masato Ito, Takuya Kobayashi, Yasutaka Iwashita, Yusuke T. Maeda, Ziyang Zhou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2026-05-26T02:12:52Z","title":"Directional Symmetry Breaking of Spherical Active Colloids by Magnetoviscous Coupling"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.26458","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:c9f516e2676c0ebf98becec24e6b3732103de872ae0bb5e140f42e1021d14e31","target":"record","created_at":"2026-05-27T01:05:19Z","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":"a218adb3878a6c6fdd4f9047ab46722cee228627b9b1c176c0694b8ad5d8a6a8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2026-05-26T02:12:52Z","title_canon_sha256":"57eaaabffbc511c6837e94701dc2c61f54c88a4f7483a543e277abd24ec24367"},"schema_version":"1.0","source":{"id":"2605.26458","kind":"arxiv","version":1}},"canonical_sha256":"8114a28c5b60bade300f429e2c205e2546639e48e2e96154cf991b35e5322757","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8114a28c5b60bade300f429e2c205e2546639e48e2e96154cf991b35e5322757","first_computed_at":"2026-05-27T01:05:19.092228Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-27T01:05:19.092228Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4BwgKp1raKF8yQlOpP4cmHqiAxWS2QApSB3cMUPJTV4EfBD0pCkx2wm4kjoSSRuf4rV/jYjOOMX7ajHY4i+8Dw==","signature_status":"signed_v1","signed_at":"2026-05-27T01:05:19.093015Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.26458","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c9f516e2676c0ebf98becec24e6b3732103de872ae0bb5e140f42e1021d14e31","sha256:c2df4ba82e90012d38c90d5daa096224df748cc60d8fde96f1779005af21ef9a"],"state_sha256":"8d5e2848619ffb1aeef6c01b2d70746490025ae6494ec600d7de771239405aeb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BFWFD2zT2gqcRt2UtJcf9OCngQKqgiwsikoRZC1vKLeCcYh/LbDywnTGuu0JUT9zxsCOHeNPU0UdHTMR9BlUAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T22:12:39.100391Z","bundle_sha256":"7abd42cf74b7bf7faa77c6e98ef79754bfaaf686cfd35febdb8b85c5ccd59458"}}