{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:GMCPWD46PV76YNRK4KPFS24WKC","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":"00e2899a3e48c7a3774d6f1f36edad82e0a5b338ec9d3a8e2ff2c5b89e08c356","cross_cats_sorted":["cond-mat.quant-gas","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math-ph","submitted_at":"2017-09-08T13:13:42Z","title_canon_sha256":"755c5e84d6d76c9c088f1f8eda8f3aed8b5c13d981ebdfd508d73ba297f21de4"},"schema_version":"1.0","source":{"id":"1709.02691","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.02691","created_at":"2026-05-18T00:10:39Z"},{"alias_kind":"arxiv_version","alias_value":"1709.02691v2","created_at":"2026-05-18T00:10:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.02691","created_at":"2026-05-18T00:10:39Z"},{"alias_kind":"pith_short_12","alias_value":"GMCPWD46PV76","created_at":"2026-05-18T12:31:18Z"},{"alias_kind":"pith_short_16","alias_value":"GMCPWD46PV76YNRK","created_at":"2026-05-18T12:31:18Z"},{"alias_kind":"pith_short_8","alias_value":"GMCPWD46","created_at":"2026-05-18T12:31:18Z"}],"graph_snapshots":[{"event_id":"sha256:26eefb2ea5523aa1cbc2d8291eeabed5915e474626bb5e68cf6e06a9ead124ef","target":"graph","created_at":"2026-05-18T00:10:39Z","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":"A system composed of an ideal gas of N fermions interacting with an impurity particle in two space dimensions is considered. The interaction between impurity and fermions is given in terms of two-body point interactions whose strength is determined by the two-body binding energy, which is a free parameter of the model. If the mass of the impurity is 1.225 times larger than the mass of a fermion, it is shown that the energy is bounded below uniformly in the number N of fermions. This result improves previous, N-dependent lower bounds and it complements a recent, similar bound for the Fermi pola","authors_text":"Marcel Griesemer, Ulrich Linden","cross_cats":["cond-mat.quant-gas","math.MP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math-ph","submitted_at":"2017-09-08T13:13:42Z","title":"Stability of the two-dimensional Fermi polaron"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.02691","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":"sha256:3992147fc9d26e458000c76750782daf9b90da33da8307054f1606077e05df3b","target":"record","created_at":"2026-05-18T00:10:39Z","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":"00e2899a3e48c7a3774d6f1f36edad82e0a5b338ec9d3a8e2ff2c5b89e08c356","cross_cats_sorted":["cond-mat.quant-gas","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math-ph","submitted_at":"2017-09-08T13:13:42Z","title_canon_sha256":"755c5e84d6d76c9c088f1f8eda8f3aed8b5c13d981ebdfd508d73ba297f21de4"},"schema_version":"1.0","source":{"id":"1709.02691","kind":"arxiv","version":2}},"canonical_sha256":"3304fb0f9e7d7fec362ae29e596b96508f4b36c030d2474dac2837dbf598d764","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3304fb0f9e7d7fec362ae29e596b96508f4b36c030d2474dac2837dbf598d764","first_computed_at":"2026-05-18T00:10:39.181107Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:10:39.181107Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FDQ1szKEMl3yKlQNAH+cSuQrmkRaOcj1lLFQSXFsD4h+SqSB57YRX6Ac1erQDqOMnnJRGQ6QZ0CsBni+eUIQAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:10:39.181717Z","signed_message":"canonical_sha256_bytes"},"source_id":"1709.02691","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3992147fc9d26e458000c76750782daf9b90da33da8307054f1606077e05df3b","sha256:26eefb2ea5523aa1cbc2d8291eeabed5915e474626bb5e68cf6e06a9ead124ef"],"state_sha256":"0198a7b214c16db49d221d58d12d0c2bd45bd33ff000bc29b2e14051db95d26f"}