{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:HRHE2VZPOFLQIYX5MSMRUTTOKS","short_pith_number":"pith:HRHE2VZP","canonical_record":{"source":{"id":"1806.08863","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-06-22T21:35:19Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"0158c5fe57b4d23420ee4c19d27ddd9ad91d0fc37d65263fe8b59cae453526ae","abstract_canon_sha256":"14a526a7b2eda001b03ad23c67f7755e331126de8dbacbb13b82fc2a68b02c7a"},"schema_version":"1.0"},"canonical_sha256":"3c4e4d572f71570462fd64991a4e6e54ab3163d6b60d4b4f97b37c9bc4c0103f","source":{"kind":"arxiv","id":"1806.08863","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.08863","created_at":"2026-05-17T23:56:47Z"},{"alias_kind":"arxiv_version","alias_value":"1806.08863v2","created_at":"2026-05-17T23:56:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.08863","created_at":"2026-05-17T23:56:47Z"},{"alias_kind":"pith_short_12","alias_value":"HRHE2VZPOFLQ","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HRHE2VZPOFLQIYX5","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HRHE2VZP","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:HRHE2VZPOFLQIYX5MSMRUTTOKS","target":"record","payload":{"canonical_record":{"source":{"id":"1806.08863","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-06-22T21:35:19Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"0158c5fe57b4d23420ee4c19d27ddd9ad91d0fc37d65263fe8b59cae453526ae","abstract_canon_sha256":"14a526a7b2eda001b03ad23c67f7755e331126de8dbacbb13b82fc2a68b02c7a"},"schema_version":"1.0"},"canonical_sha256":"3c4e4d572f71570462fd64991a4e6e54ab3163d6b60d4b4f97b37c9bc4c0103f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:56:47.785129Z","signature_b64":"9Md899QrkTk5Oq7ojp5R3n7Psj+7pVGsT1NgRUGajgRxhL6GpH/DNQpUnf+0wsODdaee530JhSvy032G/ed/DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3c4e4d572f71570462fd64991a4e6e54ab3163d6b60d4b4f97b37c9bc4c0103f","last_reissued_at":"2026-05-17T23:56:47.784634Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:56:47.784634Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1806.08863","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:56:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9x+hBtkMTWYqGARwJdVxoCM/V0cv1TLhGD0fjq9z5kL57u4LwBiSK3s5qYoLcix5xeRra/3b4R0rGSiZc6R0BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T13:49:05.468749Z"},"content_sha256":"5b359ffa0b5ece94098539f4d8025ee68db5d996830df40a099f485cf06f13d6","schema_version":"1.0","event_id":"sha256:5b359ffa0b5ece94098539f4d8025ee68db5d996830df40a099f485cf06f13d6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:HRHE2VZPOFLQIYX5MSMRUTTOKS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Entanglement spectroscopy with a depth-two quantum circuit","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"quant-ph","authors_text":"Lukasz Cincio, Patrick J. Coles, Yigit Subasi","submitted_at":"2018-06-22T21:35:19Z","abstract_excerpt":"Noisy intermediate-scale quantum (NISQ) computers have gate errors and decoherence, limiting the depth of circuits that can be implemented on them. A strategy for NISQ algorithms is to reduce the circuit depth at the expense of increasing the qubit count. Here, we exploit this trade-off for an application called entanglement spectroscopy, where one computes the entanglement of a state $| \\psi \\rangle$ on systems $AB$ by evaluating the R\\'enyi entropy of the reduced state $\\rho_A = {\\rm Tr}_B(| \\psi \\rangle \\langle \\psi |)$. For a $k$-qubit state $\\rho(k)$, the R\\'enyi entropy of order $n$ is c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.08863","kind":"arxiv","version":2},"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":"2026-05-17T23:56:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m4tnDWouZqdqATZj89AkxnDeXyrV+VCmAW3a6FOQWlfpUiX2H3phf9xpsIidBJ3kRC2kCw9y5FsBghGpq9c0Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T13:49:05.469302Z"},"content_sha256":"d5e8e41ddc268439718c7d5850ea3e1e248a0f9192bdd07296d4ad272795f5b7","schema_version":"1.0","event_id":"sha256:d5e8e41ddc268439718c7d5850ea3e1e248a0f9192bdd07296d4ad272795f5b7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HRHE2VZPOFLQIYX5MSMRUTTOKS/bundle.json","state_url":"https://pith.science/pith/HRHE2VZPOFLQIYX5MSMRUTTOKS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HRHE2VZPOFLQIYX5MSMRUTTOKS/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":"2026-05-24T13:49:05Z","links":{"resolver":"https://pith.science/pith/HRHE2VZPOFLQIYX5MSMRUTTOKS","bundle":"https://pith.science/pith/HRHE2VZPOFLQIYX5MSMRUTTOKS/bundle.json","state":"https://pith.science/pith/HRHE2VZPOFLQIYX5MSMRUTTOKS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HRHE2VZPOFLQIYX5MSMRUTTOKS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:HRHE2VZPOFLQIYX5MSMRUTTOKS","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":"14a526a7b2eda001b03ad23c67f7755e331126de8dbacbb13b82fc2a68b02c7a","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-06-22T21:35:19Z","title_canon_sha256":"0158c5fe57b4d23420ee4c19d27ddd9ad91d0fc37d65263fe8b59cae453526ae"},"schema_version":"1.0","source":{"id":"1806.08863","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.08863","created_at":"2026-05-17T23:56:47Z"},{"alias_kind":"arxiv_version","alias_value":"1806.08863v2","created_at":"2026-05-17T23:56:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.08863","created_at":"2026-05-17T23:56:47Z"},{"alias_kind":"pith_short_12","alias_value":"HRHE2VZPOFLQ","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HRHE2VZPOFLQIYX5","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HRHE2VZP","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:d5e8e41ddc268439718c7d5850ea3e1e248a0f9192bdd07296d4ad272795f5b7","target":"graph","created_at":"2026-05-17T23:56:47Z","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":"Noisy intermediate-scale quantum (NISQ) computers have gate errors and decoherence, limiting the depth of circuits that can be implemented on them. A strategy for NISQ algorithms is to reduce the circuit depth at the expense of increasing the qubit count. Here, we exploit this trade-off for an application called entanglement spectroscopy, where one computes the entanglement of a state $| \\psi \\rangle$ on systems $AB$ by evaluating the R\\'enyi entropy of the reduced state $\\rho_A = {\\rm Tr}_B(| \\psi \\rangle \\langle \\psi |)$. For a $k$-qubit state $\\rho(k)$, the R\\'enyi entropy of order $n$ is c","authors_text":"Lukasz Cincio, Patrick J. Coles, Yigit Subasi","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-06-22T21:35:19Z","title":"Entanglement spectroscopy with a depth-two quantum circuit"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.08863","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":"sha256:5b359ffa0b5ece94098539f4d8025ee68db5d996830df40a099f485cf06f13d6","target":"record","created_at":"2026-05-17T23:56:47Z","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":"14a526a7b2eda001b03ad23c67f7755e331126de8dbacbb13b82fc2a68b02c7a","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-06-22T21:35:19Z","title_canon_sha256":"0158c5fe57b4d23420ee4c19d27ddd9ad91d0fc37d65263fe8b59cae453526ae"},"schema_version":"1.0","source":{"id":"1806.08863","kind":"arxiv","version":2}},"canonical_sha256":"3c4e4d572f71570462fd64991a4e6e54ab3163d6b60d4b4f97b37c9bc4c0103f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3c4e4d572f71570462fd64991a4e6e54ab3163d6b60d4b4f97b37c9bc4c0103f","first_computed_at":"2026-05-17T23:56:47.784634Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:47.784634Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9Md899QrkTk5Oq7ojp5R3n7Psj+7pVGsT1NgRUGajgRxhL6GpH/DNQpUnf+0wsODdaee530JhSvy032G/ed/DA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:47.785129Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.08863","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5b359ffa0b5ece94098539f4d8025ee68db5d996830df40a099f485cf06f13d6","sha256:d5e8e41ddc268439718c7d5850ea3e1e248a0f9192bdd07296d4ad272795f5b7"],"state_sha256":"ed025ad8a92bf99f9d73217ed10a59d5a941d0bf3459a60928b0bfa028a92e99"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fZ3gfZsZhErZk22icuBaoeKlqGok73SrUTL6bdjJqgeViT79NbUfP3nlCk1BbdskTrar+omw2i+K3CrbynyICw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T13:49:05.472587Z","bundle_sha256":"5d4c3cb16bc3120b53da6e2a101b76d9f15816a050e0891b4077f06d182f3f46"}}