{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:XXYX2DJA44MOLA5FIKYMQ735N3","short_pith_number":"pith:XXYX2DJA","canonical_record":{"source":{"id":"1603.00434","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-03-01T20:06:03Z","cross_cats_sorted":[],"title_canon_sha256":"b12a5430115f41ef02763345feb1f337fff057fcaf68f77d6d60b16999e8787c","abstract_canon_sha256":"36fac76fd8c4fa88ce72644dec206b9a12fbc8690caea7bf85f6ddd2c5f10923"},"schema_version":"1.0"},"canonical_sha256":"bdf17d0d20e718e583a542b0c87f7d6ec5f2aa1b2c9774085bca7add43570140","source":{"kind":"arxiv","id":"1603.00434","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.00434","created_at":"2026-05-18T01:12:12Z"},{"alias_kind":"arxiv_version","alias_value":"1603.00434v2","created_at":"2026-05-18T01:12:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.00434","created_at":"2026-05-18T01:12:12Z"},{"alias_kind":"pith_short_12","alias_value":"XXYX2DJA44MO","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"XXYX2DJA44MOLA5F","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"XXYX2DJA","created_at":"2026-05-18T12:30:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:XXYX2DJA44MOLA5FIKYMQ735N3","target":"record","payload":{"canonical_record":{"source":{"id":"1603.00434","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-03-01T20:06:03Z","cross_cats_sorted":[],"title_canon_sha256":"b12a5430115f41ef02763345feb1f337fff057fcaf68f77d6d60b16999e8787c","abstract_canon_sha256":"36fac76fd8c4fa88ce72644dec206b9a12fbc8690caea7bf85f6ddd2c5f10923"},"schema_version":"1.0"},"canonical_sha256":"bdf17d0d20e718e583a542b0c87f7d6ec5f2aa1b2c9774085bca7add43570140","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:12:12.146858Z","signature_b64":"nRkXS1b9CLjOyYhfNfewm4pqrYfPyJ8bHs0sW2jYTPApXYH5UEoR9mM9k3OX9avWMwfXoS6FWr7MAGhf9tLVDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bdf17d0d20e718e583a542b0c87f7d6ec5f2aa1b2c9774085bca7add43570140","last_reissued_at":"2026-05-18T01:12:12.146390Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:12:12.146390Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1603.00434","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:12:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eTiemrVS2JqXIY183XbEbGVMQv2MVqaEwTOmRhft1J+awnvwX0bFEc6IqyOgICHj4dfA+H6oPLO3Xx9lKLDbDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T21:35:38.993788Z"},"content_sha256":"25bb1d9e4d3e541249f011859a53fdead49f4d9cf6fc5b91f4fc803e99cc3789","schema_version":"1.0","event_id":"sha256:25bb1d9e4d3e541249f011859a53fdead49f4d9cf6fc5b91f4fc803e99cc3789"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:XXYX2DJA44MOLA5FIKYMQ735N3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Probing superfluidity in a quasi two-dimensional Bose gas through its local dynamics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.quant-gas","authors_text":"Aur\\'elien Perrin (LPL), Camilla De Rossi (LPL), H\\'el\\`ene Perrin (LPL), Karina Merloti (LPL), Laurent Longchambon (LPL), Mathieu De Go\\\"er de Herve (LPL), Romain Dubessy (LPL), Thomas Badr (LPL)","submitted_at":"2016-03-01T20:06:03Z","abstract_excerpt":"We report direct evidence of superfluidity in a quasi two-dimensional Bose gas by observing its dynamical response to a collective excitation. Relying on a novel local correlation analysis, we are able to probe inhomogeneous clouds and reveal their local dynamics. We identify in this way the superfluid and thermal phases inside the gas and locate the boundary at which the Berezinskii--Kosterlitz--Thouless crossover occurs. This new analysis also allows to evidence the coupling of the two fluids which induces at finite temperatures damping rates larger than the usual Landau damping."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.00434","kind":"arxiv","version":2},"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":"2026-05-18T01:12:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"asMFmsRBMESMSA8QNcxQaaEJz4afKEDR+mjuDsH3CQbzYM6hUqHaDahai6Ih/4oqEWKzIB40bBqmvKJ7LtX7CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T21:35:38.994552Z"},"content_sha256":"bfdd3efd017951038ec7298deb4125a3080824b73c03e3806fa3a7fd64667753","schema_version":"1.0","event_id":"sha256:bfdd3efd017951038ec7298deb4125a3080824b73c03e3806fa3a7fd64667753"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XXYX2DJA44MOLA5FIKYMQ735N3/bundle.json","state_url":"https://pith.science/pith/XXYX2DJA44MOLA5FIKYMQ735N3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XXYX2DJA44MOLA5FIKYMQ735N3/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":"2026-06-08T21:35:38Z","links":{"resolver":"https://pith.science/pith/XXYX2DJA44MOLA5FIKYMQ735N3","bundle":"https://pith.science/pith/XXYX2DJA44MOLA5FIKYMQ735N3/bundle.json","state":"https://pith.science/pith/XXYX2DJA44MOLA5FIKYMQ735N3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XXYX2DJA44MOLA5FIKYMQ735N3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:XXYX2DJA44MOLA5FIKYMQ735N3","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":"36fac76fd8c4fa88ce72644dec206b9a12fbc8690caea7bf85f6ddd2c5f10923","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-03-01T20:06:03Z","title_canon_sha256":"b12a5430115f41ef02763345feb1f337fff057fcaf68f77d6d60b16999e8787c"},"schema_version":"1.0","source":{"id":"1603.00434","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.00434","created_at":"2026-05-18T01:12:12Z"},{"alias_kind":"arxiv_version","alias_value":"1603.00434v2","created_at":"2026-05-18T01:12:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.00434","created_at":"2026-05-18T01:12:12Z"},{"alias_kind":"pith_short_12","alias_value":"XXYX2DJA44MO","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"XXYX2DJA44MOLA5F","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"XXYX2DJA","created_at":"2026-05-18T12:30:51Z"}],"graph_snapshots":[{"event_id":"sha256:bfdd3efd017951038ec7298deb4125a3080824b73c03e3806fa3a7fd64667753","target":"graph","created_at":"2026-05-18T01:12:12Z","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 report direct evidence of superfluidity in a quasi two-dimensional Bose gas by observing its dynamical response to a collective excitation. Relying on a novel local correlation analysis, we are able to probe inhomogeneous clouds and reveal their local dynamics. We identify in this way the superfluid and thermal phases inside the gas and locate the boundary at which the Berezinskii--Kosterlitz--Thouless crossover occurs. This new analysis also allows to evidence the coupling of the two fluids which induces at finite temperatures damping rates larger than the usual Landau damping.","authors_text":"Aur\\'elien Perrin (LPL), Camilla De Rossi (LPL), H\\'el\\`ene Perrin (LPL), Karina Merloti (LPL), Laurent Longchambon (LPL), Mathieu De Go\\\"er de Herve (LPL), Romain Dubessy (LPL), Thomas Badr (LPL)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-03-01T20:06:03Z","title":"Probing superfluidity in a quasi two-dimensional Bose gas through its local dynamics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.00434","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":"sha256:25bb1d9e4d3e541249f011859a53fdead49f4d9cf6fc5b91f4fc803e99cc3789","target":"record","created_at":"2026-05-18T01:12:12Z","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":"36fac76fd8c4fa88ce72644dec206b9a12fbc8690caea7bf85f6ddd2c5f10923","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-03-01T20:06:03Z","title_canon_sha256":"b12a5430115f41ef02763345feb1f337fff057fcaf68f77d6d60b16999e8787c"},"schema_version":"1.0","source":{"id":"1603.00434","kind":"arxiv","version":2}},"canonical_sha256":"bdf17d0d20e718e583a542b0c87f7d6ec5f2aa1b2c9774085bca7add43570140","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bdf17d0d20e718e583a542b0c87f7d6ec5f2aa1b2c9774085bca7add43570140","first_computed_at":"2026-05-18T01:12:12.146390Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:12:12.146390Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nRkXS1b9CLjOyYhfNfewm4pqrYfPyJ8bHs0sW2jYTPApXYH5UEoR9mM9k3OX9avWMwfXoS6FWr7MAGhf9tLVDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:12:12.146858Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.00434","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:25bb1d9e4d3e541249f011859a53fdead49f4d9cf6fc5b91f4fc803e99cc3789","sha256:bfdd3efd017951038ec7298deb4125a3080824b73c03e3806fa3a7fd64667753"],"state_sha256":"928c604fd3851c07865527cb1e0faf3f7a796587918c786decf62267c6e0067d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A4GjhdBC+7CTNwM5fdhz6Yq/W4SEvgST3rQ9M7a38KThn7X3Uoyu+XQyuCJgO+rRlDZwvxJkmaBEo+ZIOGQBDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T21:35:38.998351Z","bundle_sha256":"3ea546fa75c06e5a2fd390587239faceb132ad60792163a740e7d6e8daa52925"}}