{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:LB6URPOMKTAT7Z2V3MOSVCW2O7","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":"4467ce4af992f9c27c8c8750a047b8222da8070ca8b4c3e08791ff2f0c6a4d20","cross_cats_sorted":["cs.CC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-01-17T15:54:16Z","title_canon_sha256":"39dcdfb75c6052e822628b55a94eac1d5e8543b9463c8b9b757eb7a29680bc11"},"schema_version":"1.0","source":{"id":"1801.05721","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.05721","created_at":"2026-05-17T23:42:03Z"},{"alias_kind":"arxiv_version","alias_value":"1801.05721v2","created_at":"2026-05-17T23:42:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.05721","created_at":"2026-05-17T23:42:03Z"},{"alias_kind":"pith_short_12","alias_value":"LB6URPOMKTAT","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"LB6URPOMKTAT7Z2V","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"LB6URPOM","created_at":"2026-05-18T12:32:33Z"}],"graph_snapshots":[{"event_id":"sha256:e907c9dd727c6c762b65c6b497531fc620f8502eeabeaa2b1ec50422953ea333","target":"graph","created_at":"2026-05-17T23:42:03Z","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 show how to approximately represent a quantum state using the square root of the usual amount of classical memory. The classical representation of an $n$-qubit state $\\psi$ consists of its inner products with $O(\\sqrt{2^n})$ stabilizer states. A quantum state initially specified by its $2^n$ entries in the computational basis can be compressed to this form in time $O(2^n \\mathrm{poly}(n))$, and, subsequently, the compressed description can be used to additively approximate the expectation value of an arbitrary observable. Our compression scheme directly gives a new protocol for the vector i","authors_text":"David Gosset, John Smolin","cross_cats":["cs.CC"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-01-17T15:54:16Z","title":"A compressed classical description of quantum states"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.05721","kind":"arxiv","version":2},"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":"sha256:2de5cdf8ff14ab488b2435b4a3a3d4325dee912394e17f1f48181fcb918417ae","target":"record","created_at":"2026-05-17T23:42:03Z","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":"4467ce4af992f9c27c8c8750a047b8222da8070ca8b4c3e08791ff2f0c6a4d20","cross_cats_sorted":["cs.CC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-01-17T15:54:16Z","title_canon_sha256":"39dcdfb75c6052e822628b55a94eac1d5e8543b9463c8b9b757eb7a29680bc11"},"schema_version":"1.0","source":{"id":"1801.05721","kind":"arxiv","version":2}},"canonical_sha256":"587d48bdcc54c13fe755db1d2a8ada77e34963ae6d6ca3bb5af951d553c7bf28","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"587d48bdcc54c13fe755db1d2a8ada77e34963ae6d6ca3bb5af951d553c7bf28","first_computed_at":"2026-05-17T23:42:03.291418Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:03.291418Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kpU4gWjCaL+UYj3ykJ6ZXYi1HaUVCURsiSA2UKrF0gnj3LKuZfjrWj7ijvnKlGFTKCacXc3rMB7SFjluGRFSAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:03.292106Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.05721","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2de5cdf8ff14ab488b2435b4a3a3d4325dee912394e17f1f48181fcb918417ae","sha256:e907c9dd727c6c762b65c6b497531fc620f8502eeabeaa2b1ec50422953ea333"],"state_sha256":"6d2515d0de359afa6769a0b2b437e0d1d3dd715244225ef8f91644bbf7156a66"}