{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2020:OQLFSJOARWPH5XNQMIJJFYLABP","short_pith_number":"pith:OQLFSJOA","schema_version":"1.0","canonical_sha256":"74165925c08d9e7eddb0621292e1600becc5735c4902316447ffe5541c63b966","source":{"kind":"arxiv","id":"2004.04850","version":1},"attestation_state":"computed","paper":{"title":"Entropy production in the quantum walk","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"quant-ph","authors_text":"Alejandro Romanelli, Andr\\'es Vallejo, Ra\\'ul Donangelo, Renato Portugal","submitted_at":"2020-04-09T23:18:29Z","abstract_excerpt":"We explore the notion of generated entropy in open quantum systems. We focus on the study of the discrete-time quantum walk on the line, from the entropy production perspective. We argue that the evolution of the coin can be modeled as an open two-level system that exchanges energy with the lattice at some effective temperature that depends on the initial state. The entropy balance shows that there is a positive entropy production during the evolution, in accordance with the second law of thermodynamics."},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2004.04850","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-04-09T23:18:29Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"7c0317221fe8df8abd261a29c2e70b7b325962f6122941d6913957b1c31e24b6","abstract_canon_sha256":"478f065960b371ed25eaf9f1e1593816db2cec1e4715b2cc832779d275e1e4ff"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:54:14.794232Z","signature_b64":"KKmvJ/GOwmJ3zHUgzkjpHA3ILyWUfXm2iLke/nhc9Fumc2mJBAQw0/wWC+I4r6Dzs94m/jXRc+cwcSbNReExAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"74165925c08d9e7eddb0621292e1600becc5735c4902316447ffe5541c63b966","last_reissued_at":"2026-07-05T00:54:14.793694Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:54:14.793694Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Entropy production in the quantum walk","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"quant-ph","authors_text":"Alejandro Romanelli, Andr\\'es Vallejo, Ra\\'ul Donangelo, Renato Portugal","submitted_at":"2020-04-09T23:18:29Z","abstract_excerpt":"We explore the notion of generated entropy in open quantum systems. We focus on the study of the discrete-time quantum walk on the line, from the entropy production perspective. We argue that the evolution of the coin can be modeled as an open two-level system that exchanges energy with the lattice at some effective temperature that depends on the initial state. The entropy balance shows that there is a positive entropy production during the evolution, in accordance with the second law of thermodynamics."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.04850","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/2004.04850/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2004.04850","created_at":"2026-07-05T00:54:14.793771+00:00"},{"alias_kind":"arxiv_version","alias_value":"2004.04850v1","created_at":"2026-07-05T00:54:14.793771+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.04850","created_at":"2026-07-05T00:54:14.793771+00:00"},{"alias_kind":"pith_short_12","alias_value":"OQLFSJOARWPH","created_at":"2026-07-05T00:54:14.793771+00:00"},{"alias_kind":"pith_short_16","alias_value":"OQLFSJOARWPH5XNQ","created_at":"2026-07-05T00:54:14.793771+00:00"},{"alias_kind":"pith_short_8","alias_value":"OQLFSJOA","created_at":"2026-07-05T00:54:14.793771+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/OQLFSJOARWPH5XNQMIJJFYLABP","json":"https://pith.science/pith/OQLFSJOARWPH5XNQMIJJFYLABP.json","graph_json":"https://pith.science/api/pith-number/OQLFSJOARWPH5XNQMIJJFYLABP/graph.json","events_json":"https://pith.science/api/pith-number/OQLFSJOARWPH5XNQMIJJFYLABP/events.json","paper":"https://pith.science/paper/OQLFSJOA"},"agent_actions":{"view_html":"https://pith.science/pith/OQLFSJOARWPH5XNQMIJJFYLABP","download_json":"https://pith.science/pith/OQLFSJOARWPH5XNQMIJJFYLABP.json","view_paper":"https://pith.science/paper/OQLFSJOA","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2004.04850&json=true","fetch_graph":"https://pith.science/api/pith-number/OQLFSJOARWPH5XNQMIJJFYLABP/graph.json","fetch_events":"https://pith.science/api/pith-number/OQLFSJOARWPH5XNQMIJJFYLABP/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/OQLFSJOARWPH5XNQMIJJFYLABP/action/timestamp_anchor","attest_storage":"https://pith.science/pith/OQLFSJOARWPH5XNQMIJJFYLABP/action/storage_attestation","attest_author":"https://pith.science/pith/OQLFSJOARWPH5XNQMIJJFYLABP/action/author_attestation","sign_citation":"https://pith.science/pith/OQLFSJOARWPH5XNQMIJJFYLABP/action/citation_signature","submit_replication":"https://pith.science/pith/OQLFSJOARWPH5XNQMIJJFYLABP/action/replication_record"}},"created_at":"2026-07-05T00:54:14.793771+00:00","updated_at":"2026-07-05T00:54:14.793771+00:00"}