{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:2VICCA4NN2J7ARDBIS5DENRTXS","short_pith_number":"pith:2VICCA4N","canonical_record":{"source":{"id":"1509.05656","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-09-18T15:16:26Z","cross_cats_sorted":["cond-mat.quant-gas"],"title_canon_sha256":"80c92cc848ef7b72f35ba5d975f102684ba6d7cd0fa862d806d42b0c0c967867","abstract_canon_sha256":"ce757d22e563e759310be86f540b547a84395091a8cfada7c36576dda3a5de1c"},"schema_version":"1.0"},"canonical_sha256":"d55021038d6e93f0446144ba323633bc98ffce9ca2bf624334ec7221cb8e7e96","source":{"kind":"arxiv","id":"1509.05656","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.05656","created_at":"2026-05-18T01:18:33Z"},{"alias_kind":"arxiv_version","alias_value":"1509.05656v2","created_at":"2026-05-18T01:18:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.05656","created_at":"2026-05-18T01:18:33Z"},{"alias_kind":"pith_short_12","alias_value":"2VICCA4NN2J7","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_16","alias_value":"2VICCA4NN2J7ARDB","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_8","alias_value":"2VICCA4N","created_at":"2026-05-18T12:29:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:2VICCA4NN2J7ARDBIS5DENRTXS","target":"record","payload":{"canonical_record":{"source":{"id":"1509.05656","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-09-18T15:16:26Z","cross_cats_sorted":["cond-mat.quant-gas"],"title_canon_sha256":"80c92cc848ef7b72f35ba5d975f102684ba6d7cd0fa862d806d42b0c0c967867","abstract_canon_sha256":"ce757d22e563e759310be86f540b547a84395091a8cfada7c36576dda3a5de1c"},"schema_version":"1.0"},"canonical_sha256":"d55021038d6e93f0446144ba323633bc98ffce9ca2bf624334ec7221cb8e7e96","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:18:33.100116Z","signature_b64":"qGQ8922BTJajGrvCJL5MMXwypYre74ACaWQXAbneuWui4WsAWdfPBXp47uMUIie2u+6h8UzvXPY9qOzzebeSBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d55021038d6e93f0446144ba323633bc98ffce9ca2bf624334ec7221cb8e7e96","last_reissued_at":"2026-05-18T01:18:33.099735Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:18:33.099735Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.05656","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":"2026-05-18T01:18:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LZFUL7i47D2ENDfQFIUUW5IYxea0XFjIHsNdD0wfKzeJ8hHm8nhkfsQRYu6pBjj/WVtUvoiH/+tvRDYP/XuJDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T22:31:06.790124Z"},"content_sha256":"e5f9977bbfebed8fb6eede3e7ec19f5423e8389665bc516706f35a659e0c7525","schema_version":"1.0","event_id":"sha256:e5f9977bbfebed8fb6eede3e7ec19f5423e8389665bc516706f35a659e0c7525"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:2VICCA4NN2J7ARDBIS5DENRTXS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Purity oscillations in Bose-Einstein condensates with balanced gain and loss","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.quant-gas"],"primary_cat":"quant-ph","authors_text":"Daniel Haag, Dennis Dast, G\\\"unter Wunner, Holger Cartarius","submitted_at":"2015-09-18T15:16:26Z","abstract_excerpt":"In this work we present a new generic feature of PT-symmetric Bose-Einstein condensates by studying the many-particle description of a two-mode condensate with balanced gain and loss. This is achieved using a master equation in Lindblad form whose mean-field limit is a PT-symmetric Gross-Pitaevskii equation. It is shown that the purity of the condensate periodically drops to small values but then is nearly completely restored. This has a direct impact on the average contrast in interference experiments which cannot be covered by the mean-field approximation, in which a completely pure condensa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.05656","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":"2026-05-18T01:18:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TKbMQoiIceE7Hf7zJ9Hwa0n9hTOlLqfkQASEAxbB8sUYLO79wSG2hnWG5MQ0BsmQLKWf+2G4xBgYzGjSrMPPBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T22:31:06.790841Z"},"content_sha256":"9aee621dca24a0683a868e20da79dbd8963fd2d442f9ad2c4fc6fffc4df8f501","schema_version":"1.0","event_id":"sha256:9aee621dca24a0683a868e20da79dbd8963fd2d442f9ad2c4fc6fffc4df8f501"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2VICCA4NN2J7ARDBIS5DENRTXS/bundle.json","state_url":"https://pith.science/pith/2VICCA4NN2J7ARDBIS5DENRTXS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2VICCA4NN2J7ARDBIS5DENRTXS/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":"2026-06-10T22:31:06Z","links":{"resolver":"https://pith.science/pith/2VICCA4NN2J7ARDBIS5DENRTXS","bundle":"https://pith.science/pith/2VICCA4NN2J7ARDBIS5DENRTXS/bundle.json","state":"https://pith.science/pith/2VICCA4NN2J7ARDBIS5DENRTXS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2VICCA4NN2J7ARDBIS5DENRTXS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:2VICCA4NN2J7ARDBIS5DENRTXS","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":"ce757d22e563e759310be86f540b547a84395091a8cfada7c36576dda3a5de1c","cross_cats_sorted":["cond-mat.quant-gas"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-09-18T15:16:26Z","title_canon_sha256":"80c92cc848ef7b72f35ba5d975f102684ba6d7cd0fa862d806d42b0c0c967867"},"schema_version":"1.0","source":{"id":"1509.05656","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.05656","created_at":"2026-05-18T01:18:33Z"},{"alias_kind":"arxiv_version","alias_value":"1509.05656v2","created_at":"2026-05-18T01:18:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.05656","created_at":"2026-05-18T01:18:33Z"},{"alias_kind":"pith_short_12","alias_value":"2VICCA4NN2J7","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_16","alias_value":"2VICCA4NN2J7ARDB","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_8","alias_value":"2VICCA4N","created_at":"2026-05-18T12:29:02Z"}],"graph_snapshots":[{"event_id":"sha256:9aee621dca24a0683a868e20da79dbd8963fd2d442f9ad2c4fc6fffc4df8f501","target":"graph","created_at":"2026-05-18T01:18:33Z","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":"In this work we present a new generic feature of PT-symmetric Bose-Einstein condensates by studying the many-particle description of a two-mode condensate with balanced gain and loss. This is achieved using a master equation in Lindblad form whose mean-field limit is a PT-symmetric Gross-Pitaevskii equation. It is shown that the purity of the condensate periodically drops to small values but then is nearly completely restored. This has a direct impact on the average contrast in interference experiments which cannot be covered by the mean-field approximation, in which a completely pure condensa","authors_text":"Daniel Haag, Dennis Dast, G\\\"unter Wunner, Holger Cartarius","cross_cats":["cond-mat.quant-gas"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-09-18T15:16:26Z","title":"Purity oscillations in Bose-Einstein condensates with balanced gain and loss"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.05656","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:e5f9977bbfebed8fb6eede3e7ec19f5423e8389665bc516706f35a659e0c7525","target":"record","created_at":"2026-05-18T01:18:33Z","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":"ce757d22e563e759310be86f540b547a84395091a8cfada7c36576dda3a5de1c","cross_cats_sorted":["cond-mat.quant-gas"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-09-18T15:16:26Z","title_canon_sha256":"80c92cc848ef7b72f35ba5d975f102684ba6d7cd0fa862d806d42b0c0c967867"},"schema_version":"1.0","source":{"id":"1509.05656","kind":"arxiv","version":2}},"canonical_sha256":"d55021038d6e93f0446144ba323633bc98ffce9ca2bf624334ec7221cb8e7e96","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d55021038d6e93f0446144ba323633bc98ffce9ca2bf624334ec7221cb8e7e96","first_computed_at":"2026-05-18T01:18:33.099735Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:18:33.099735Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qGQ8922BTJajGrvCJL5MMXwypYre74ACaWQXAbneuWui4WsAWdfPBXp47uMUIie2u+6h8UzvXPY9qOzzebeSBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:18:33.100116Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.05656","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e5f9977bbfebed8fb6eede3e7ec19f5423e8389665bc516706f35a659e0c7525","sha256:9aee621dca24a0683a868e20da79dbd8963fd2d442f9ad2c4fc6fffc4df8f501"],"state_sha256":"b616b8099f89196abace385363de93d186d016dccb6a79d8d21cb666ed18aa4e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H5gBnRUtfBYKMgXU3MF562JIoXCs+FJ1VtH6aIaEmx3/H1vTZbBT1MlJNDOjfiV5o98hyXH/KiTqRohinzpsAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T22:31:06.794813Z","bundle_sha256":"dc835a297c8a63eae21ec7a63883492be01746770f0b081bcf6c1eb9b831ad90"}}