{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:CBXUETEONRH4FPUQMHJC5GX4YT","short_pith_number":"pith:CBXUETEO","canonical_record":{"source":{"id":"2605.24335","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-05-23T01:32:55Z","cross_cats_sorted":[],"title_canon_sha256":"bf34191dcaf3e3e4ca40a01a1043828c0a5c207137a8a2b2c2510084e4ea3f0f","abstract_canon_sha256":"1a7bb65fb012409b6d0612842e8f7369680ae4930f3068449b9656c1dd961bff"},"schema_version":"1.0"},"canonical_sha256":"106f424c8e6c4fc2be9061d22e9afcc4d9a624a9c5444511961374e2b003447a","source":{"kind":"arxiv","id":"2605.24335","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.24335","created_at":"2026-05-26T01:03:00Z"},{"alias_kind":"arxiv_version","alias_value":"2605.24335v1","created_at":"2026-05-26T01:03:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.24335","created_at":"2026-05-26T01:03:00Z"},{"alias_kind":"pith_short_12","alias_value":"CBXUETEONRH4","created_at":"2026-05-26T01:03:00Z"},{"alias_kind":"pith_short_16","alias_value":"CBXUETEONRH4FPUQ","created_at":"2026-05-26T01:03:00Z"},{"alias_kind":"pith_short_8","alias_value":"CBXUETEO","created_at":"2026-05-26T01:03:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:CBXUETEONRH4FPUQMHJC5GX4YT","target":"record","payload":{"canonical_record":{"source":{"id":"2605.24335","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-05-23T01:32:55Z","cross_cats_sorted":[],"title_canon_sha256":"bf34191dcaf3e3e4ca40a01a1043828c0a5c207137a8a2b2c2510084e4ea3f0f","abstract_canon_sha256":"1a7bb65fb012409b6d0612842e8f7369680ae4930f3068449b9656c1dd961bff"},"schema_version":"1.0"},"canonical_sha256":"106f424c8e6c4fc2be9061d22e9afcc4d9a624a9c5444511961374e2b003447a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-26T01:03:00.560007Z","signature_b64":"Lg9L2RCQzEQRq+tI6e8lGlbzAMn3NjYm30c6umMKIfcC3xJVdtyo+2Hz+1YprzIZjM2zQ0dXjryKmW0fEI5+DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"106f424c8e6c4fc2be9061d22e9afcc4d9a624a9c5444511961374e2b003447a","last_reissued_at":"2026-05-26T01:03:00.556013Z","signature_status":"signed_v1","first_computed_at":"2026-05-26T01:03:00.556013Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2605.24335","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":"2026-05-26T01:03:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nRdo55gEP9TLsTJSgZB90LXER7fvYAtaVujHC9WNASBfOXuqkvQmPQOK0Qbb/vhGgR65cjgO535cwGVus9HeBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T20:16:38.652352Z"},"content_sha256":"ce3bee373cb823c8b858764aa37c72033270285c3b07edd25c56d6135ffe8015","schema_version":"1.0","event_id":"sha256:ce3bee373cb823c8b858764aa37c72033270285c3b07edd25c56d6135ffe8015"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:CBXUETEONRH4FPUQMHJC5GX4YT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Local Impurity Induced Growth and Scrambling in Clean Free Fermions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Qucheng Gao, Vikram Ravindranath, Xiao Chen","submitted_at":"2026-05-23T01:32:55Z","abstract_excerpt":"We study impurity-induced particle growth and scrambling in clean one-dimensional free-fermion systems. We show that a single local impurity can act as a branching source: particle or operator weight propagates coherently into the free bulk, returns to the impurity, and is locally converted into additional degrees of freedom. We develop this branching picture in three complementary settings: a monitored free-fermion model with feedback, a fully unitary interacting particle model, and Heisenberg operator dynamics with an interacting impurity. In the monitored model, we find a feedback-driven tr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.24335","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/2605.24335/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":"2026-05-26T01:03:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vgav3CNmiWXTsKMfAJD0XGRfIL4otDJ0T/ik6955KRSchNZNGyRVEYY6swAeEdWQ2mf4CzPU8pqSQc78VjrQCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T20:16:38.653044Z"},"content_sha256":"6b367f7e5b04ded016858be0506dac1f75dae15beacf403f91f3c77f84f70949","schema_version":"1.0","event_id":"sha256:6b367f7e5b04ded016858be0506dac1f75dae15beacf403f91f3c77f84f70949"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CBXUETEONRH4FPUQMHJC5GX4YT/bundle.json","state_url":"https://pith.science/pith/CBXUETEONRH4FPUQMHJC5GX4YT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CBXUETEONRH4FPUQMHJC5GX4YT/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":"2026-06-06T20:16:38Z","links":{"resolver":"https://pith.science/pith/CBXUETEONRH4FPUQMHJC5GX4YT","bundle":"https://pith.science/pith/CBXUETEONRH4FPUQMHJC5GX4YT/bundle.json","state":"https://pith.science/pith/CBXUETEONRH4FPUQMHJC5GX4YT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CBXUETEONRH4FPUQMHJC5GX4YT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:CBXUETEONRH4FPUQMHJC5GX4YT","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":"1a7bb65fb012409b6d0612842e8f7369680ae4930f3068449b9656c1dd961bff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-05-23T01:32:55Z","title_canon_sha256":"bf34191dcaf3e3e4ca40a01a1043828c0a5c207137a8a2b2c2510084e4ea3f0f"},"schema_version":"1.0","source":{"id":"2605.24335","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.24335","created_at":"2026-05-26T01:03:00Z"},{"alias_kind":"arxiv_version","alias_value":"2605.24335v1","created_at":"2026-05-26T01:03:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.24335","created_at":"2026-05-26T01:03:00Z"},{"alias_kind":"pith_short_12","alias_value":"CBXUETEONRH4","created_at":"2026-05-26T01:03:00Z"},{"alias_kind":"pith_short_16","alias_value":"CBXUETEONRH4FPUQ","created_at":"2026-05-26T01:03:00Z"},{"alias_kind":"pith_short_8","alias_value":"CBXUETEO","created_at":"2026-05-26T01:03:00Z"}],"graph_snapshots":[{"event_id":"sha256:6b367f7e5b04ded016858be0506dac1f75dae15beacf403f91f3c77f84f70949","target":"graph","created_at":"2026-05-26T01:03:00Z","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/2605.24335/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study impurity-induced particle growth and scrambling in clean one-dimensional free-fermion systems. We show that a single local impurity can act as a branching source: particle or operator weight propagates coherently into the free bulk, returns to the impurity, and is locally converted into additional degrees of freedom. We develop this branching picture in three complementary settings: a monitored free-fermion model with feedback, a fully unitary interacting particle model, and Heisenberg operator dynamics with an interacting impurity. In the monitored model, we find a feedback-driven tr","authors_text":"Qucheng Gao, Vikram Ravindranath, Xiao Chen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-05-23T01:32:55Z","title":"Local Impurity Induced Growth and Scrambling in Clean Free Fermions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.24335","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:ce3bee373cb823c8b858764aa37c72033270285c3b07edd25c56d6135ffe8015","target":"record","created_at":"2026-05-26T01:03:00Z","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":"1a7bb65fb012409b6d0612842e8f7369680ae4930f3068449b9656c1dd961bff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-05-23T01:32:55Z","title_canon_sha256":"bf34191dcaf3e3e4ca40a01a1043828c0a5c207137a8a2b2c2510084e4ea3f0f"},"schema_version":"1.0","source":{"id":"2605.24335","kind":"arxiv","version":1}},"canonical_sha256":"106f424c8e6c4fc2be9061d22e9afcc4d9a624a9c5444511961374e2b003447a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"106f424c8e6c4fc2be9061d22e9afcc4d9a624a9c5444511961374e2b003447a","first_computed_at":"2026-05-26T01:03:00.556013Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-26T01:03:00.556013Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Lg9L2RCQzEQRq+tI6e8lGlbzAMn3NjYm30c6umMKIfcC3xJVdtyo+2Hz+1YprzIZjM2zQ0dXjryKmW0fEI5+DQ==","signature_status":"signed_v1","signed_at":"2026-05-26T01:03:00.560007Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.24335","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ce3bee373cb823c8b858764aa37c72033270285c3b07edd25c56d6135ffe8015","sha256:6b367f7e5b04ded016858be0506dac1f75dae15beacf403f91f3c77f84f70949"],"state_sha256":"b7b4b6bbf0582fc40762a02f0d172da59b93281428636ed36cab3717f572d192"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AJRdecAmS/aFp5gSBeMzCN1+v75qyErwga78gqcV2y0BxohdgVh5JAZvAwUBsrdHJk6+OzIJ5kUrvZbeG2DsCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T20:16:38.656395Z","bundle_sha256":"22041ed8b91cb5a66b4e02d6315008adb30231bba6680666fa99550f2db13c49"}}