{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:LMXAZD6LBT4YQH7UIV55ZVAYYH","short_pith_number":"pith:LMXAZD6L","canonical_record":{"source":{"id":"2107.02709","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-07-06T16:14:07Z","cross_cats_sorted":["cond-mat.quant-gas"],"title_canon_sha256":"844386dc2e6c03b11b0049a0fa587f5b5a440aa2d1315d0889f0ed010e6bfd81","abstract_canon_sha256":"7358ec563197fd5a87a082a5e3372333662d1224a65a9c575d16dac30c795c3a"},"schema_version":"1.0"},"canonical_sha256":"5b2e0c8fcb0cf9881ff4457bdcd418c1cf0473a0e3f69aed8caa7963342d44a9","source":{"kind":"arxiv","id":"2107.02709","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.02709","created_at":"2026-07-05T03:18:28Z"},{"alias_kind":"arxiv_version","alias_value":"2107.02709v3","created_at":"2026-07-05T03:18:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.02709","created_at":"2026-07-05T03:18:28Z"},{"alias_kind":"pith_short_12","alias_value":"LMXAZD6LBT4Y","created_at":"2026-07-05T03:18:28Z"},{"alias_kind":"pith_short_16","alias_value":"LMXAZD6LBT4YQH7U","created_at":"2026-07-05T03:18:28Z"},{"alias_kind":"pith_short_8","alias_value":"LMXAZD6L","created_at":"2026-07-05T03:18:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:LMXAZD6LBT4YQH7UIV55ZVAYYH","target":"record","payload":{"canonical_record":{"source":{"id":"2107.02709","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-07-06T16:14:07Z","cross_cats_sorted":["cond-mat.quant-gas"],"title_canon_sha256":"844386dc2e6c03b11b0049a0fa587f5b5a440aa2d1315d0889f0ed010e6bfd81","abstract_canon_sha256":"7358ec563197fd5a87a082a5e3372333662d1224a65a9c575d16dac30c795c3a"},"schema_version":"1.0"},"canonical_sha256":"5b2e0c8fcb0cf9881ff4457bdcd418c1cf0473a0e3f69aed8caa7963342d44a9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:18:28.405462Z","signature_b64":"zcqf1qZp9qDr20y/5xWvB+RAHTHpcMcsWXCY+R5WDYS5XeOUH4eHhWuiUMQy8IbeM5j5t41ZHMA84j1bCqHsDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5b2e0c8fcb0cf9881ff4457bdcd418c1cf0473a0e3f69aed8caa7963342d44a9","last_reissued_at":"2026-07-05T03:18:28.404968Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:18:28.404968Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2107.02709","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:18:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Znveep8o3PYQlJSt6xP1pxLHYipXciAMNEHiSuHl+xtv7ZHjy43gMdtnTCku6dqMsUfpKsKi+xaA1a/y+HufCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T23:13:52.192514Z"},"content_sha256":"14c3e0f73d9cfd4fea96a75b5c49a41f9160beba0aa04cdaa9d6092b6a7ffba5","schema_version":"1.0","event_id":"sha256:14c3e0f73d9cfd4fea96a75b5c49a41f9160beba0aa04cdaa9d6092b6a7ffba5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:LMXAZD6LBT4YQH7UIV55ZVAYYH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Exact zeros of the Loschmidt echo and quantum speed limit time for the dynamical quantum phase transition in finite-size systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.quant-gas"],"primary_cat":"quant-ph","authors_text":"Bozhen Zhou, Shu Chen, Yumeng Zeng","submitted_at":"2021-07-06T16:14:07Z","abstract_excerpt":"We study exact zeros of Loschmidt echo and quantum speed limit time for dynamical quantum phase transition in finite size systems. Our results illustrate that exact zeros of Loschmidt echo exist even in finite size quantum systems when the postquench parameter takes some discrete values in regions with the corresponding equilibrium phase different from the initial phase. As the system size increases and tends to infinity, the discrete parameters distribute continuously in the parameter regions. We further analyze the time for the appearance of the first exact zero of Loschmidt echo which is kn"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.02709","kind":"arxiv","version":3},"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/2107.02709/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":"2026-07-05T03:18:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LSegtbGbDLgfd6cRyc6dFzDo6ts8DgnOY6rSQuDruAjJUvQ3MSP7UIs4K3Cd2m3CfG4R/UUU2smnAD+XL8X7DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T23:13:52.193064Z"},"content_sha256":"810a45f1beee84fd7b7566bfb88193d7ee5d3fdd07b79f6b889777ae28a1b008","schema_version":"1.0","event_id":"sha256:810a45f1beee84fd7b7566bfb88193d7ee5d3fdd07b79f6b889777ae28a1b008"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LMXAZD6LBT4YQH7UIV55ZVAYYH/bundle.json","state_url":"https://pith.science/pith/LMXAZD6LBT4YQH7UIV55ZVAYYH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LMXAZD6LBT4YQH7UIV55ZVAYYH/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":"2026-08-16T23:13:52Z","links":{"resolver":"https://pith.science/pith/LMXAZD6LBT4YQH7UIV55ZVAYYH","bundle":"https://pith.science/pith/LMXAZD6LBT4YQH7UIV55ZVAYYH/bundle.json","state":"https://pith.science/pith/LMXAZD6LBT4YQH7UIV55ZVAYYH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LMXAZD6LBT4YQH7UIV55ZVAYYH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:LMXAZD6LBT4YQH7UIV55ZVAYYH","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":"7358ec563197fd5a87a082a5e3372333662d1224a65a9c575d16dac30c795c3a","cross_cats_sorted":["cond-mat.quant-gas"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-07-06T16:14:07Z","title_canon_sha256":"844386dc2e6c03b11b0049a0fa587f5b5a440aa2d1315d0889f0ed010e6bfd81"},"schema_version":"1.0","source":{"id":"2107.02709","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.02709","created_at":"2026-07-05T03:18:28Z"},{"alias_kind":"arxiv_version","alias_value":"2107.02709v3","created_at":"2026-07-05T03:18:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.02709","created_at":"2026-07-05T03:18:28Z"},{"alias_kind":"pith_short_12","alias_value":"LMXAZD6LBT4Y","created_at":"2026-07-05T03:18:28Z"},{"alias_kind":"pith_short_16","alias_value":"LMXAZD6LBT4YQH7U","created_at":"2026-07-05T03:18:28Z"},{"alias_kind":"pith_short_8","alias_value":"LMXAZD6L","created_at":"2026-07-05T03:18:28Z"}],"graph_snapshots":[{"event_id":"sha256:810a45f1beee84fd7b7566bfb88193d7ee5d3fdd07b79f6b889777ae28a1b008","target":"graph","created_at":"2026-07-05T03:18:28Z","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/2107.02709/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study exact zeros of Loschmidt echo and quantum speed limit time for dynamical quantum phase transition in finite size systems. Our results illustrate that exact zeros of Loschmidt echo exist even in finite size quantum systems when the postquench parameter takes some discrete values in regions with the corresponding equilibrium phase different from the initial phase. As the system size increases and tends to infinity, the discrete parameters distribute continuously in the parameter regions. We further analyze the time for the appearance of the first exact zero of Loschmidt echo which is kn","authors_text":"Bozhen Zhou, Shu Chen, Yumeng Zeng","cross_cats":["cond-mat.quant-gas"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-07-06T16:14:07Z","title":"Exact zeros of the Loschmidt echo and quantum speed limit time for the dynamical quantum phase transition in finite-size systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.02709","kind":"arxiv","version":3},"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":"sha256:14c3e0f73d9cfd4fea96a75b5c49a41f9160beba0aa04cdaa9d6092b6a7ffba5","target":"record","created_at":"2026-07-05T03:18:28Z","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":"7358ec563197fd5a87a082a5e3372333662d1224a65a9c575d16dac30c795c3a","cross_cats_sorted":["cond-mat.quant-gas"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-07-06T16:14:07Z","title_canon_sha256":"844386dc2e6c03b11b0049a0fa587f5b5a440aa2d1315d0889f0ed010e6bfd81"},"schema_version":"1.0","source":{"id":"2107.02709","kind":"arxiv","version":3}},"canonical_sha256":"5b2e0c8fcb0cf9881ff4457bdcd418c1cf0473a0e3f69aed8caa7963342d44a9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5b2e0c8fcb0cf9881ff4457bdcd418c1cf0473a0e3f69aed8caa7963342d44a9","first_computed_at":"2026-07-05T03:18:28.404968Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:18:28.404968Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zcqf1qZp9qDr20y/5xWvB+RAHTHpcMcsWXCY+R5WDYS5XeOUH4eHhWuiUMQy8IbeM5j5t41ZHMA84j1bCqHsDg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:18:28.405462Z","signed_message":"canonical_sha256_bytes"},"source_id":"2107.02709","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:14c3e0f73d9cfd4fea96a75b5c49a41f9160beba0aa04cdaa9d6092b6a7ffba5","sha256:810a45f1beee84fd7b7566bfb88193d7ee5d3fdd07b79f6b889777ae28a1b008"],"state_sha256":"b1f7e5341da6005aa63bf984953121a033d58b5e9d83b8efa6341f3c73ae979a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1bQul0wMY484o87jIvvBvjKUDugyAeHDBd/202k5NmQSS3BXRZmQpEGweL01EnFRQp9JrU5XpzEoaUEp19CQDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T23:13:52.196147Z","bundle_sha256":"9e1f33b21dd5dd5ca9169d8f7c48d4ac3e4e7a78267ba250aa1fc86b6895c07b"}}