{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:WKDA43Y5D3MEOU4UXKAZDQDP3X","short_pith_number":"pith:WKDA43Y5","canonical_record":{"source":{"id":"2606.26266","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-06-24T18:08:26Z","cross_cats_sorted":["cond-mat.mes-hall","physics.optics"],"title_canon_sha256":"499becf578b0afd310b7ecdb2287fbdcf1cb723a2f0d1c9219d97470a10ef766","abstract_canon_sha256":"d47e1ccb8225c3348b0aafbabb3e697323726cb2daa799eb4a4be91ddaec344f"},"schema_version":"1.0"},"canonical_sha256":"b2860e6f1d1ed8475394ba8191c06fdde1215c9d6c18cf8a339edd48164c51ce","source":{"kind":"arxiv","id":"2606.26266","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.26266","created_at":"2026-06-26T00:15:31Z"},{"alias_kind":"arxiv_version","alias_value":"2606.26266v1","created_at":"2026-06-26T00:15:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.26266","created_at":"2026-06-26T00:15:31Z"},{"alias_kind":"pith_short_12","alias_value":"WKDA43Y5D3ME","created_at":"2026-06-26T00:15:31Z"},{"alias_kind":"pith_short_16","alias_value":"WKDA43Y5D3MEOU4U","created_at":"2026-06-26T00:15:31Z"},{"alias_kind":"pith_short_8","alias_value":"WKDA43Y5","created_at":"2026-06-26T00:15:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:WKDA43Y5D3MEOU4UXKAZDQDP3X","target":"record","payload":{"canonical_record":{"source":{"id":"2606.26266","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-06-24T18:08:26Z","cross_cats_sorted":["cond-mat.mes-hall","physics.optics"],"title_canon_sha256":"499becf578b0afd310b7ecdb2287fbdcf1cb723a2f0d1c9219d97470a10ef766","abstract_canon_sha256":"d47e1ccb8225c3348b0aafbabb3e697323726cb2daa799eb4a4be91ddaec344f"},"schema_version":"1.0"},"canonical_sha256":"b2860e6f1d1ed8475394ba8191c06fdde1215c9d6c18cf8a339edd48164c51ce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-26T00:15:31.834816Z","signature_b64":"WHMfeWZXlCQ5ES33dwAc9xeJrIm8IGHw8NzbOgAEnO6cMMXGyOnr1oF2g8PnDbSltYmezC1c6YNYYWML8eNtBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b2860e6f1d1ed8475394ba8191c06fdde1215c9d6c18cf8a339edd48164c51ce","last_reissued_at":"2026-06-26T00:15:31.834418Z","signature_status":"signed_v1","first_computed_at":"2026-06-26T00:15:31.834418Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.26266","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":"2026-06-26T00:15:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xv2Pp7CA7K79h5cDVnLMZ+yMbIqmG1cvmH/h5+CwQ82/P8yHb7KqvQ4iNYXSwDH2MPFAM+1lS/rQtnNXlR0gCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T11:50:55.962343Z"},"content_sha256":"e90777d82fced986045ad2ffbd6c0f3f60282692c5d89a270436f10b4403d73e","schema_version":"1.0","event_id":"sha256:e90777d82fced986045ad2ffbd6c0f3f60282692c5d89a270436f10b4403d73e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:WKDA43Y5D3MEOU4UXKAZDQDP3X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Complex frequency-dependent quadrature squeezing in semiconductor lasers","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mes-hall","physics.optics"],"primary_cat":"quant-ph","authors_text":"Daniele Nello, Giuseppe Patera, Lorenzo Columbo","submitted_at":"2026-06-24T18:08:26Z","abstract_excerpt":"We present a comprehensive study of quadrature squeezing in a quantum well laser based on a fully quantum Langevin approach. We compute the frequency-resolved squeezing map of the laser field and identify optimal squeezing curves, revealing, for the first time to our knowledge, both frequency-dependent squeezing and complex or hidden squeezing in a semiconductor laser. We further analyse the role of the linewidth enhancement factor (alpha factor) in the emergence of these features. Our results establish semiconductor lasers as a platform for the generation of non-classical light and open new p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.26266","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/2606.26266/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":"2026-06-26T00:15:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NuFU5rJ9rtiQrrl2ZVqZ+xcN57lIdWnB57qwk+hv2Fso2cC+mDpbza1htyX1V0Zc0/bgZ9GgpN9JTmookOc/Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T11:50:55.962744Z"},"content_sha256":"2e0de8190d81cfa62151cbca634399c5ece70ab4534dbc45efd96c7bf45fe263","schema_version":"1.0","event_id":"sha256:2e0de8190d81cfa62151cbca634399c5ece70ab4534dbc45efd96c7bf45fe263"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WKDA43Y5D3MEOU4UXKAZDQDP3X/bundle.json","state_url":"https://pith.science/pith/WKDA43Y5D3MEOU4UXKAZDQDP3X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WKDA43Y5D3MEOU4UXKAZDQDP3X/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":"2026-06-26T11:50:55Z","links":{"resolver":"https://pith.science/pith/WKDA43Y5D3MEOU4UXKAZDQDP3X","bundle":"https://pith.science/pith/WKDA43Y5D3MEOU4UXKAZDQDP3X/bundle.json","state":"https://pith.science/pith/WKDA43Y5D3MEOU4UXKAZDQDP3X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WKDA43Y5D3MEOU4UXKAZDQDP3X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:WKDA43Y5D3MEOU4UXKAZDQDP3X","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":"d47e1ccb8225c3348b0aafbabb3e697323726cb2daa799eb4a4be91ddaec344f","cross_cats_sorted":["cond-mat.mes-hall","physics.optics"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-06-24T18:08:26Z","title_canon_sha256":"499becf578b0afd310b7ecdb2287fbdcf1cb723a2f0d1c9219d97470a10ef766"},"schema_version":"1.0","source":{"id":"2606.26266","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.26266","created_at":"2026-06-26T00:15:31Z"},{"alias_kind":"arxiv_version","alias_value":"2606.26266v1","created_at":"2026-06-26T00:15:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.26266","created_at":"2026-06-26T00:15:31Z"},{"alias_kind":"pith_short_12","alias_value":"WKDA43Y5D3ME","created_at":"2026-06-26T00:15:31Z"},{"alias_kind":"pith_short_16","alias_value":"WKDA43Y5D3MEOU4U","created_at":"2026-06-26T00:15:31Z"},{"alias_kind":"pith_short_8","alias_value":"WKDA43Y5","created_at":"2026-06-26T00:15:31Z"}],"graph_snapshots":[{"event_id":"sha256:2e0de8190d81cfa62151cbca634399c5ece70ab4534dbc45efd96c7bf45fe263","target":"graph","created_at":"2026-06-26T00:15:31Z","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/2606.26266/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a comprehensive study of quadrature squeezing in a quantum well laser based on a fully quantum Langevin approach. We compute the frequency-resolved squeezing map of the laser field and identify optimal squeezing curves, revealing, for the first time to our knowledge, both frequency-dependent squeezing and complex or hidden squeezing in a semiconductor laser. We further analyse the role of the linewidth enhancement factor (alpha factor) in the emergence of these features. Our results establish semiconductor lasers as a platform for the generation of non-classical light and open new p","authors_text":"Daniele Nello, Giuseppe Patera, Lorenzo Columbo","cross_cats":["cond-mat.mes-hall","physics.optics"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-06-24T18:08:26Z","title":"Complex frequency-dependent quadrature squeezing in semiconductor lasers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.26266","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:e90777d82fced986045ad2ffbd6c0f3f60282692c5d89a270436f10b4403d73e","target":"record","created_at":"2026-06-26T00:15:31Z","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":"d47e1ccb8225c3348b0aafbabb3e697323726cb2daa799eb4a4be91ddaec344f","cross_cats_sorted":["cond-mat.mes-hall","physics.optics"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-06-24T18:08:26Z","title_canon_sha256":"499becf578b0afd310b7ecdb2287fbdcf1cb723a2f0d1c9219d97470a10ef766"},"schema_version":"1.0","source":{"id":"2606.26266","kind":"arxiv","version":1}},"canonical_sha256":"b2860e6f1d1ed8475394ba8191c06fdde1215c9d6c18cf8a339edd48164c51ce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b2860e6f1d1ed8475394ba8191c06fdde1215c9d6c18cf8a339edd48164c51ce","first_computed_at":"2026-06-26T00:15:31.834418Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-26T00:15:31.834418Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WHMfeWZXlCQ5ES33dwAc9xeJrIm8IGHw8NzbOgAEnO6cMMXGyOnr1oF2g8PnDbSltYmezC1c6YNYYWML8eNtBQ==","signature_status":"signed_v1","signed_at":"2026-06-26T00:15:31.834816Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.26266","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e90777d82fced986045ad2ffbd6c0f3f60282692c5d89a270436f10b4403d73e","sha256:2e0de8190d81cfa62151cbca634399c5ece70ab4534dbc45efd96c7bf45fe263"],"state_sha256":"9e7d00d071cf9af4598774b1e7469e6c174615d9452365f38d0d81f7606d3b36"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Em/QVUgVdyhOnBwCpgzRioRMwFxlgqDFDjGM0m77yrsbTcuzH6WFfysNOi3fOGMxHnINw7+6IJ6FPpzf5XaDCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T11:50:55.965120Z","bundle_sha256":"87c15a90e0cf950fe079c0f2773e072119f757373134ac5f257db0baf616eaa2"}}