{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:XF2CL5M7VBHIEEIRKIJ42R6URB","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":"545209278a687cf49d42af6ec163d98ed6948c1beb9385072dc23877c44d2824","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-06-05T10:23:36Z","title_canon_sha256":"3f386498731a074ab7442dd540d712ab25e532538eb8f0684709f5ae60158f94"},"schema_version":"1.0","source":{"id":"1406.1321","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.1321","created_at":"2026-05-18T01:04:50Z"},{"alias_kind":"arxiv_version","alias_value":"1406.1321v1","created_at":"2026-05-18T01:04:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.1321","created_at":"2026-05-18T01:04:50Z"},{"alias_kind":"pith_short_12","alias_value":"XF2CL5M7VBHI","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"XF2CL5M7VBHIEEIR","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"XF2CL5M7","created_at":"2026-05-18T12:28:57Z"}],"graph_snapshots":[{"event_id":"sha256:32bdafe65d58cdab892707152485c2132786fce7bcb380ad9d178b713a0059f0","target":"graph","created_at":"2026-05-18T01:04:50Z","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 present a quantum communication experiment conducted over a point-to-point free-space link of 1.6 km in urban conditions. We study atmospheric influences on the capability of the link to act as a continuous-variable (CV) quantum channel. Continuous polarization states (that contain the signal encoding as well as a local oscillator in the same spatial mode) are prepared and sent over the link in a polarization multiplexed setting. Both signal and local oscillator undergo the same atmospheric fluctuations. These are intrinsically auto-compensated which removes detrimental influences on the in","authors_text":"Bettina Heim, Christian Peuntinger, Christoffer Wittmann, Christoph Marquardt, Gerd Leuchs, Imran Khan, Nathan Killoran","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-06-05T10:23:36Z","title":"Atmospheric continuous-variable quantum communication"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.1321","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":"sha256:448f519738c8a17fb7d82c26ea97865701ddceede817f63aafb97c6020a24f84","target":"record","created_at":"2026-05-18T01:04:50Z","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":"545209278a687cf49d42af6ec163d98ed6948c1beb9385072dc23877c44d2824","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-06-05T10:23:36Z","title_canon_sha256":"3f386498731a074ab7442dd540d712ab25e532538eb8f0684709f5ae60158f94"},"schema_version":"1.0","source":{"id":"1406.1321","kind":"arxiv","version":1}},"canonical_sha256":"b97425f59fa84e8211115213cd47d4887ff3b7e126de3dd4777c9a05636ef4b4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b97425f59fa84e8211115213cd47d4887ff3b7e126de3dd4777c9a05636ef4b4","first_computed_at":"2026-05-18T01:04:50.749331Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:04:50.749331Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"f+kQnbprWOT0WoyVYGkrkvPmTtjxNLND8FUJ5rgVxYoOVn0fiFO7KIOGkiKiXIhh8MElCUJ9sGRvYBtQOXqUAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:04:50.749821Z","signed_message":"canonical_sha256_bytes"},"source_id":"1406.1321","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:448f519738c8a17fb7d82c26ea97865701ddceede817f63aafb97c6020a24f84","sha256:32bdafe65d58cdab892707152485c2132786fce7bcb380ad9d178b713a0059f0"],"state_sha256":"3e1480af59e6340b2664361bfcdda15b9260fbb1252308ff7d17b2edef6820be"}