{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:MLXFODPK2LPJPSPPUQCMT52FJ7","short_pith_number":"pith:MLXFODPK","canonical_record":{"source":{"id":"1607.07717","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2016-07-26T14:27:12Z","cross_cats_sorted":["nlin.SI"],"title_canon_sha256":"dca2193d51e8a08343dc6ea2300f060c18404a82473756f6912398bf58845668","abstract_canon_sha256":"d14e4f1a94a3adfd09336348bd9e83798f32ede0ffc8e5fbbcc407f92f81e14e"},"schema_version":"1.0"},"canonical_sha256":"62ee570dead2de97c9efa404c9f7454fe740eded732d0aa2e3d88fa5438808e7","source":{"kind":"arxiv","id":"1607.07717","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.07717","created_at":"2026-05-18T01:02:58Z"},{"alias_kind":"arxiv_version","alias_value":"1607.07717v1","created_at":"2026-05-18T01:02:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.07717","created_at":"2026-05-18T01:02:58Z"},{"alias_kind":"pith_short_12","alias_value":"MLXFODPK2LPJ","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"MLXFODPK2LPJPSPP","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"MLXFODPK","created_at":"2026-05-18T12:30:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:MLXFODPK2LPJPSPPUQCMT52FJ7","target":"record","payload":{"canonical_record":{"source":{"id":"1607.07717","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2016-07-26T14:27:12Z","cross_cats_sorted":["nlin.SI"],"title_canon_sha256":"dca2193d51e8a08343dc6ea2300f060c18404a82473756f6912398bf58845668","abstract_canon_sha256":"d14e4f1a94a3adfd09336348bd9e83798f32ede0ffc8e5fbbcc407f92f81e14e"},"schema_version":"1.0"},"canonical_sha256":"62ee570dead2de97c9efa404c9f7454fe740eded732d0aa2e3d88fa5438808e7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:02:58.856325Z","signature_b64":"BUfSBclf1Z88YH/j83usEKyJsk1Ug57W0WPl5qdARmYxu3YrrHe81NL5hZE6FpYWd4g1ytX8866YfdQWaFTJAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"62ee570dead2de97c9efa404c9f7454fe740eded732d0aa2e3d88fa5438808e7","last_reissued_at":"2026-05-18T01:02:58.855638Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:02:58.855638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.07717","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":"2026-05-18T01:02:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BXhXmloPEO3lIumEFQe2kgJOlTbs65flqjxGOX/dLJ9lrF44/SXtxLlv8UyKHGGpuZQ6sT+GVeB27ZvfxV5dBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T13:45:47.008648Z"},"content_sha256":"52f8c6f47dcf451de576936b890ba11b81db774213b9bdaf1e87a3b8b70ad719","schema_version":"1.0","event_id":"sha256:52f8c6f47dcf451de576936b890ba11b81db774213b9bdaf1e87a3b8b70ad719"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:MLXFODPK2LPJPSPPUQCMT52FJ7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tunable $\\varphi$ Josephson Junction ratchet","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nlin.SI"],"primary_cat":"cond-mat.supr-con","authors_text":"D. Koelle, E. Goldobin, H. Kohlstedt, H. Sickinger, M. Weides, R. Kleiner, R. Menditto","submitted_at":"2016-07-26T14:27:12Z","abstract_excerpt":"We demonstrate experimentally the operation of a deterministic Josephson ratchet with tunable asymmetry. The ratchet is based on a $\\varphi$ Josephson junction with a ferromagnetic barrier operating in the underdamped regime. The system is probed also under the action of an additional dc current, which acts as a counter force trying to stop the ratchet. Under these conditions the ratchet works against the counter force, thus producing a non-zero output power. Finally, we estimate the efficiency of the $\\varphi$ Josephson junction ratchet."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.07717","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":"2026-05-18T01:02:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aCFqvBeYw6Qlx7Wj1FFia2+N38gKj6LEgmPEPHhGkTq+l2jKjceEKFblekvvm65NejQR4AsWB8vcSdpqH6G3Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T13:45:47.009325Z"},"content_sha256":"06897a4eba6f4ee11b0a4ea446b7b530fb0ee79bb37e50995160eb5643a3f9c6","schema_version":"1.0","event_id":"sha256:06897a4eba6f4ee11b0a4ea446b7b530fb0ee79bb37e50995160eb5643a3f9c6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MLXFODPK2LPJPSPPUQCMT52FJ7/bundle.json","state_url":"https://pith.science/pith/MLXFODPK2LPJPSPPUQCMT52FJ7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MLXFODPK2LPJPSPPUQCMT52FJ7/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":"2026-05-26T13:45:47Z","links":{"resolver":"https://pith.science/pith/MLXFODPK2LPJPSPPUQCMT52FJ7","bundle":"https://pith.science/pith/MLXFODPK2LPJPSPPUQCMT52FJ7/bundle.json","state":"https://pith.science/pith/MLXFODPK2LPJPSPPUQCMT52FJ7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MLXFODPK2LPJPSPPUQCMT52FJ7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:MLXFODPK2LPJPSPPUQCMT52FJ7","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":"d14e4f1a94a3adfd09336348bd9e83798f32ede0ffc8e5fbbcc407f92f81e14e","cross_cats_sorted":["nlin.SI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2016-07-26T14:27:12Z","title_canon_sha256":"dca2193d51e8a08343dc6ea2300f060c18404a82473756f6912398bf58845668"},"schema_version":"1.0","source":{"id":"1607.07717","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.07717","created_at":"2026-05-18T01:02:58Z"},{"alias_kind":"arxiv_version","alias_value":"1607.07717v1","created_at":"2026-05-18T01:02:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.07717","created_at":"2026-05-18T01:02:58Z"},{"alias_kind":"pith_short_12","alias_value":"MLXFODPK2LPJ","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"MLXFODPK2LPJPSPP","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"MLXFODPK","created_at":"2026-05-18T12:30:32Z"}],"graph_snapshots":[{"event_id":"sha256:06897a4eba6f4ee11b0a4ea446b7b530fb0ee79bb37e50995160eb5643a3f9c6","target":"graph","created_at":"2026-05-18T01:02:58Z","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 experimentally the operation of a deterministic Josephson ratchet with tunable asymmetry. The ratchet is based on a $\\varphi$ Josephson junction with a ferromagnetic barrier operating in the underdamped regime. The system is probed also under the action of an additional dc current, which acts as a counter force trying to stop the ratchet. Under these conditions the ratchet works against the counter force, thus producing a non-zero output power. Finally, we estimate the efficiency of the $\\varphi$ Josephson junction ratchet.","authors_text":"D. Koelle, E. Goldobin, H. Kohlstedt, H. Sickinger, M. Weides, R. Kleiner, R. Menditto","cross_cats":["nlin.SI"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2016-07-26T14:27:12Z","title":"Tunable $\\varphi$ Josephson Junction ratchet"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.07717","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":"sha256:52f8c6f47dcf451de576936b890ba11b81db774213b9bdaf1e87a3b8b70ad719","target":"record","created_at":"2026-05-18T01:02:58Z","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":"d14e4f1a94a3adfd09336348bd9e83798f32ede0ffc8e5fbbcc407f92f81e14e","cross_cats_sorted":["nlin.SI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2016-07-26T14:27:12Z","title_canon_sha256":"dca2193d51e8a08343dc6ea2300f060c18404a82473756f6912398bf58845668"},"schema_version":"1.0","source":{"id":"1607.07717","kind":"arxiv","version":1}},"canonical_sha256":"62ee570dead2de97c9efa404c9f7454fe740eded732d0aa2e3d88fa5438808e7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"62ee570dead2de97c9efa404c9f7454fe740eded732d0aa2e3d88fa5438808e7","first_computed_at":"2026-05-18T01:02:58.855638Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:02:58.855638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BUfSBclf1Z88YH/j83usEKyJsk1Ug57W0WPl5qdARmYxu3YrrHe81NL5hZE6FpYWd4g1ytX8866YfdQWaFTJAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:02:58.856325Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.07717","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:52f8c6f47dcf451de576936b890ba11b81db774213b9bdaf1e87a3b8b70ad719","sha256:06897a4eba6f4ee11b0a4ea446b7b530fb0ee79bb37e50995160eb5643a3f9c6"],"state_sha256":"12ad3c020aa05ec8184bd7da693e3af37444616048f4e865ba97679b9afc4280"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vRMPYUgnQ185dO2sp08J3hjK0pNVZAenY3vLAqFw1CBBxtFb3HVlYMWWCsoRVjz7jPhQN4zZrs/OEM3DAKFGBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T13:45:47.013060Z","bundle_sha256":"b35bfaab997e81d2592f0f99411145a886f2531c539d64ac708b1f02bff319ff"}}