{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:56WKHWP35XSGYVHYWONRI32EZ3","short_pith_number":"pith:56WKHWP3","canonical_record":{"source":{"id":"quant-ph/0603260","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"2006-03-28T20:56:37Z","cross_cats_sorted":[],"title_canon_sha256":"c90920fcfba64708c66c08f5eab91a0c4208ef42e6a875a55403cc8a13699b4a","abstract_canon_sha256":"daebbd83a7b51bb8cab29545c078366e835614de8493448b4e5d3653f29881f1"},"schema_version":"1.0"},"canonical_sha256":"efaca3d9fbede46c54f8b39b146f44cecbe96fe5bee226cb489c33b641cf71e4","source":{"kind":"arxiv","id":"quant-ph/0603260","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0603260","created_at":"2026-07-04T14:54:07Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0603260v1","created_at":"2026-07-04T14:54:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0603260","created_at":"2026-07-04T14:54:07Z"},{"alias_kind":"pith_short_12","alias_value":"56WKHWP35XSG","created_at":"2026-07-04T14:54:07Z"},{"alias_kind":"pith_short_16","alias_value":"56WKHWP35XSGYVHY","created_at":"2026-07-04T14:54:07Z"},{"alias_kind":"pith_short_8","alias_value":"56WKHWP3","created_at":"2026-07-04T14:54:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:56WKHWP35XSGYVHYWONRI32EZ3","target":"record","payload":{"canonical_record":{"source":{"id":"quant-ph/0603260","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"2006-03-28T20:56:37Z","cross_cats_sorted":[],"title_canon_sha256":"c90920fcfba64708c66c08f5eab91a0c4208ef42e6a875a55403cc8a13699b4a","abstract_canon_sha256":"daebbd83a7b51bb8cab29545c078366e835614de8493448b4e5d3653f29881f1"},"schema_version":"1.0"},"canonical_sha256":"efaca3d9fbede46c54f8b39b146f44cecbe96fe5bee226cb489c33b641cf71e4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:54:07.228030Z","signature_b64":"6D6QDE9arp7i18NQbr/SBVa/aZTgeKPGw8aQidPze0yttmERt6kN8+GZSklmFFQOm3PepkDg9JoJC64sUwpnDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"efaca3d9fbede46c54f8b39b146f44cecbe96fe5bee226cb489c33b641cf71e4","last_reissued_at":"2026-07-04T14:54:07.227619Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:54:07.227619Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"quant-ph/0603260","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":"2026-07-04T14:54:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2FLpna4wx9Pz5kS8mRtVhIvfLLJh9Ua6SC+Rjak2xYj2TxS7Yis0gMCLflOo6PqoLR6N/E71g3oeGRyxJc2+Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T20:12:58.126245Z"},"content_sha256":"2ba94a0b3d9f425090f4263a75ba96d02c4bdbfe508316ce55866181721bf195","schema_version":"1.0","event_id":"sha256:2ba94a0b3d9f425090f4263a75ba96d02c4bdbfe508316ce55866181721bf195"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:56WKHWP35XSGYVHYWONRI32EZ3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Can one build a quantum hard drive? A no-go theorem for storing quantum information in equilibrium systems","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Michal Horodecki, Robert Alicki","submitted_at":"2006-03-28T20:56:37Z","abstract_excerpt":"We prove a no-go theorem for storing quantum information in equilibrium systems. Namely, quantum information cannot be stored in a system with time-independent Hamiltonian interacting with heat bath of temperature $T>0$ during time that grows with the number of used qubits. We prove it by showing, that storing quantum information for macroscopic time would imply existence of perpetuum mobile of the second kind. The general results are illustrated by the Kitaev model of quantum memory. In contrast, classical information can be stored in equilibrium states for arbitrary long times. We show how i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0603260","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/quant-ph/0603260/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":"2026-07-04T14:54:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L11Nd8VdX8A7BdJNrCECC2ULATmjTM1saoyZJVyELOHHiRFs7Cbx8S/bXaWuo+f9ORKAymjXDYtvhw1DxM65AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T20:12:58.126659Z"},"content_sha256":"bfc013b3abc3959fbf333c0204b9a027149dbf64171bb58a39e20abe511cc6e8","schema_version":"1.0","event_id":"sha256:bfc013b3abc3959fbf333c0204b9a027149dbf64171bb58a39e20abe511cc6e8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/56WKHWP35XSGYVHYWONRI32EZ3/bundle.json","state_url":"https://pith.science/pith/56WKHWP35XSGYVHYWONRI32EZ3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/56WKHWP35XSGYVHYWONRI32EZ3/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":"2026-08-13T20:12:58Z","links":{"resolver":"https://pith.science/pith/56WKHWP35XSGYVHYWONRI32EZ3","bundle":"https://pith.science/pith/56WKHWP35XSGYVHYWONRI32EZ3/bundle.json","state":"https://pith.science/pith/56WKHWP35XSGYVHYWONRI32EZ3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/56WKHWP35XSGYVHYWONRI32EZ3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:56WKHWP35XSGYVHYWONRI32EZ3","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":"daebbd83a7b51bb8cab29545c078366e835614de8493448b4e5d3653f29881f1","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2006-03-28T20:56:37Z","title_canon_sha256":"c90920fcfba64708c66c08f5eab91a0c4208ef42e6a875a55403cc8a13699b4a"},"schema_version":"1.0","source":{"id":"quant-ph/0603260","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0603260","created_at":"2026-07-04T14:54:07Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0603260v1","created_at":"2026-07-04T14:54:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0603260","created_at":"2026-07-04T14:54:07Z"},{"alias_kind":"pith_short_12","alias_value":"56WKHWP35XSG","created_at":"2026-07-04T14:54:07Z"},{"alias_kind":"pith_short_16","alias_value":"56WKHWP35XSGYVHY","created_at":"2026-07-04T14:54:07Z"},{"alias_kind":"pith_short_8","alias_value":"56WKHWP3","created_at":"2026-07-04T14:54:07Z"}],"graph_snapshots":[{"event_id":"sha256:bfc013b3abc3959fbf333c0204b9a027149dbf64171bb58a39e20abe511cc6e8","target":"graph","created_at":"2026-07-04T14:54:07Z","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/quant-ph/0603260/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We prove a no-go theorem for storing quantum information in equilibrium systems. Namely, quantum information cannot be stored in a system with time-independent Hamiltonian interacting with heat bath of temperature $T>0$ during time that grows with the number of used qubits. We prove it by showing, that storing quantum information for macroscopic time would imply existence of perpetuum mobile of the second kind. The general results are illustrated by the Kitaev model of quantum memory. In contrast, classical information can be stored in equilibrium states for arbitrary long times. We show how i","authors_text":"Michal Horodecki, Robert Alicki","cross_cats":[],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"2006-03-28T20:56:37Z","title":"Can one build a quantum hard drive? A no-go theorem for storing quantum information in equilibrium systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0603260","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":"sha256:2ba94a0b3d9f425090f4263a75ba96d02c4bdbfe508316ce55866181721bf195","target":"record","created_at":"2026-07-04T14:54:07Z","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":"daebbd83a7b51bb8cab29545c078366e835614de8493448b4e5d3653f29881f1","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2006-03-28T20:56:37Z","title_canon_sha256":"c90920fcfba64708c66c08f5eab91a0c4208ef42e6a875a55403cc8a13699b4a"},"schema_version":"1.0","source":{"id":"quant-ph/0603260","kind":"arxiv","version":1}},"canonical_sha256":"efaca3d9fbede46c54f8b39b146f44cecbe96fe5bee226cb489c33b641cf71e4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"efaca3d9fbede46c54f8b39b146f44cecbe96fe5bee226cb489c33b641cf71e4","first_computed_at":"2026-07-04T14:54:07.227619Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:54:07.227619Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6D6QDE9arp7i18NQbr/SBVa/aZTgeKPGw8aQidPze0yttmERt6kN8+GZSklmFFQOm3PepkDg9JoJC64sUwpnDg==","signature_status":"signed_v1","signed_at":"2026-07-04T14:54:07.228030Z","signed_message":"canonical_sha256_bytes"},"source_id":"quant-ph/0603260","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2ba94a0b3d9f425090f4263a75ba96d02c4bdbfe508316ce55866181721bf195","sha256:bfc013b3abc3959fbf333c0204b9a027149dbf64171bb58a39e20abe511cc6e8"],"state_sha256":"b24346b214482a9ca36e9b2d9ee0c79c6044acecb9c593faff712686fa15fa5c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FAo1WE3XF4STmcEE2sc9GHbEpApg1dIkUdOZ6L0hp5vkamy0bQn/CWidR0iTZbN6FS75IR1KIIoqqg4a7QucDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-13T20:12:58.131703Z","bundle_sha256":"1461c2acfa241e6bc8304cb75456d1e2e1dcb2eee44bdbe0f995e57166919f2c"}}