{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:VSFSQS54UKDJBNBK7CMXCLR3YN","short_pith_number":"pith:VSFSQS54","canonical_record":{"source":{"id":"1609.08109","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-09-26T18:32:30Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.quant-gas"],"title_canon_sha256":"d834d844c14a4bd3cc62d0879ac3d86dbc9836a03f0a9da6efc93f8f00334342","abstract_canon_sha256":"5b85233e57e7bddaa4fa608a46e6a0831935eaac0ce32717bc16c69a86aea5be"},"schema_version":"1.0"},"canonical_sha256":"ac8b284bbca28690b42af899712e3bc36049f80709519a5014e8494a0048adf5","source":{"kind":"arxiv","id":"1609.08109","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.08109","created_at":"2026-05-18T00:47:10Z"},{"alias_kind":"arxiv_version","alias_value":"1609.08109v1","created_at":"2026-05-18T00:47:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.08109","created_at":"2026-05-18T00:47:10Z"},{"alias_kind":"pith_short_12","alias_value":"VSFSQS54UKDJ","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VSFSQS54UKDJBNBK","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VSFSQS54","created_at":"2026-05-18T12:30:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:VSFSQS54UKDJBNBK7CMXCLR3YN","target":"record","payload":{"canonical_record":{"source":{"id":"1609.08109","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-09-26T18:32:30Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.quant-gas"],"title_canon_sha256":"d834d844c14a4bd3cc62d0879ac3d86dbc9836a03f0a9da6efc93f8f00334342","abstract_canon_sha256":"5b85233e57e7bddaa4fa608a46e6a0831935eaac0ce32717bc16c69a86aea5be"},"schema_version":"1.0"},"canonical_sha256":"ac8b284bbca28690b42af899712e3bc36049f80709519a5014e8494a0048adf5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:47:10.402240Z","signature_b64":"QrfXTcfTAERz543ZIqO0pctTKVW2yNeQ/rgnT5oiVtDdMLnOS5ml2MRFLKcsgqzdfI6xh1RLpRG4FkJ3Ki2rAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ac8b284bbca28690b42af899712e3bc36049f80709519a5014e8494a0048adf5","last_reissued_at":"2026-05-18T00:47:10.401438Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:47:10.401438Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1609.08109","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":"2026-05-18T00:47:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Yz1CV9dpnEUTDOqYIeWyeBdEamxT7g9w6t0lkm376QVz+R8DB2tsgiY16HvUjWFnvWQCG1QsIBshyxX66L6VDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T15:21:28.226950Z"},"content_sha256":"8ea19693245fdc0b4c561f9d898f917f427ce699bd1b78e276b26391ed54cdf4","schema_version":"1.0","event_id":"sha256:8ea19693245fdc0b4c561f9d898f917f427ce699bd1b78e276b26391ed54cdf4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:VSFSQS54UKDJBNBK7CMXCLR3YN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultra-low threshold polariton condensation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall","cond-mat.quant-gas"],"primary_cat":"physics.optics","authors_text":"Angelo Mascarenhas, Brian Fluegel, David W. Snoke, Ken West, Kirstin Alberi, Loren N. Pfeiffer, Mark Steger","submitted_at":"2016-09-26T18:32:30Z","abstract_excerpt":"We demonstrate condensation of microcavity polaritons with a very sharp threshold occuring at two orders of magnitude lower pump intensity than previous demonstrations of condensation. The long cavity-lifetime and trapping and pumping geometries are crucial to the realization of this low threshold. Polariton condensation, or \"polariton lasing\" has long been proposed as a promising source of coherent light at lower threshold than traditional lasing, and these results suggest methods to bring this threshold even lower."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.08109","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":""},"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":"2026-05-18T00:47:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2M8VPMUu7HgRdQlnWfetBZfYo3oQ4fggQhDzrJ2i/IHU37n8f7OmC45S508dcFwIMPpHeqr2f0S71p5BHx26Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T15:21:28.227626Z"},"content_sha256":"9b96d9a4b41945a3dbe4fb6f8696e3642b3f84f173785e7d3e8da186069e23ac","schema_version":"1.0","event_id":"sha256:9b96d9a4b41945a3dbe4fb6f8696e3642b3f84f173785e7d3e8da186069e23ac"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VSFSQS54UKDJBNBK7CMXCLR3YN/bundle.json","state_url":"https://pith.science/pith/VSFSQS54UKDJBNBK7CMXCLR3YN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VSFSQS54UKDJBNBK7CMXCLR3YN/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":"2026-05-25T15:21:28Z","links":{"resolver":"https://pith.science/pith/VSFSQS54UKDJBNBK7CMXCLR3YN","bundle":"https://pith.science/pith/VSFSQS54UKDJBNBK7CMXCLR3YN/bundle.json","state":"https://pith.science/pith/VSFSQS54UKDJBNBK7CMXCLR3YN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VSFSQS54UKDJBNBK7CMXCLR3YN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:VSFSQS54UKDJBNBK7CMXCLR3YN","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":"5b85233e57e7bddaa4fa608a46e6a0831935eaac0ce32717bc16c69a86aea5be","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.quant-gas"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-09-26T18:32:30Z","title_canon_sha256":"d834d844c14a4bd3cc62d0879ac3d86dbc9836a03f0a9da6efc93f8f00334342"},"schema_version":"1.0","source":{"id":"1609.08109","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.08109","created_at":"2026-05-18T00:47:10Z"},{"alias_kind":"arxiv_version","alias_value":"1609.08109v1","created_at":"2026-05-18T00:47:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.08109","created_at":"2026-05-18T00:47:10Z"},{"alias_kind":"pith_short_12","alias_value":"VSFSQS54UKDJ","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VSFSQS54UKDJBNBK","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VSFSQS54","created_at":"2026-05-18T12:30:48Z"}],"graph_snapshots":[{"event_id":"sha256:9b96d9a4b41945a3dbe4fb6f8696e3642b3f84f173785e7d3e8da186069e23ac","target":"graph","created_at":"2026-05-18T00:47:10Z","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 demonstrate condensation of microcavity polaritons with a very sharp threshold occuring at two orders of magnitude lower pump intensity than previous demonstrations of condensation. The long cavity-lifetime and trapping and pumping geometries are crucial to the realization of this low threshold. Polariton condensation, or \"polariton lasing\" has long been proposed as a promising source of coherent light at lower threshold than traditional lasing, and these results suggest methods to bring this threshold even lower.","authors_text":"Angelo Mascarenhas, Brian Fluegel, David W. Snoke, Ken West, Kirstin Alberi, Loren N. Pfeiffer, Mark Steger","cross_cats":["cond-mat.mes-hall","cond-mat.quant-gas"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-09-26T18:32:30Z","title":"Ultra-low threshold polariton condensation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.08109","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":"sha256:8ea19693245fdc0b4c561f9d898f917f427ce699bd1b78e276b26391ed54cdf4","target":"record","created_at":"2026-05-18T00:47:10Z","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":"5b85233e57e7bddaa4fa608a46e6a0831935eaac0ce32717bc16c69a86aea5be","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.quant-gas"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-09-26T18:32:30Z","title_canon_sha256":"d834d844c14a4bd3cc62d0879ac3d86dbc9836a03f0a9da6efc93f8f00334342"},"schema_version":"1.0","source":{"id":"1609.08109","kind":"arxiv","version":1}},"canonical_sha256":"ac8b284bbca28690b42af899712e3bc36049f80709519a5014e8494a0048adf5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ac8b284bbca28690b42af899712e3bc36049f80709519a5014e8494a0048adf5","first_computed_at":"2026-05-18T00:47:10.401438Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:47:10.401438Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QrfXTcfTAERz543ZIqO0pctTKVW2yNeQ/rgnT5oiVtDdMLnOS5ml2MRFLKcsgqzdfI6xh1RLpRG4FkJ3Ki2rAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:47:10.402240Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.08109","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8ea19693245fdc0b4c561f9d898f917f427ce699bd1b78e276b26391ed54cdf4","sha256:9b96d9a4b41945a3dbe4fb6f8696e3642b3f84f173785e7d3e8da186069e23ac"],"state_sha256":"213d99b29d42a3d288f29fdd30572c47635bcbdad99ef8dcfea24599ac520551"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pcvg9bre7okTFW0NSJwi1zhpdzh1avfUDA6XqI78oWfY5R/dgTfy7QfGwQL6H8vWJd51qH5NGRYsKpdGyC8SAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T15:21:28.231151Z","bundle_sha256":"7792752aacf3de07daa9746477e0ecbfc4e6eafe97e14aa43146b43be36b6a76"}}