{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:H2C7QNYBM7B7QYTJLD65XKGAOI","short_pith_number":"pith:H2C7QNYB","canonical_record":{"source":{"id":"1002.1920","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-02-09T18:01:22Z","cross_cats_sorted":[],"title_canon_sha256":"c7b9d7787b7c54954316eb880fa22945eb0c0646326363702563fb294a914685","abstract_canon_sha256":"dbbb48479513c6af1e5bf7e6ff55361d63fa5df5537ad9e47477c57a0d705982"},"schema_version":"1.0"},"canonical_sha256":"3e85f8370167c3f8626958fddba8c072186d426e1552a4ce7d38696591ae30d3","source":{"kind":"arxiv","id":"1002.1920","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.1920","created_at":"2026-05-18T04:32:34Z"},{"alias_kind":"arxiv_version","alias_value":"1002.1920v1","created_at":"2026-05-18T04:32:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.1920","created_at":"2026-05-18T04:32:34Z"},{"alias_kind":"pith_short_12","alias_value":"H2C7QNYBM7B7","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_16","alias_value":"H2C7QNYBM7B7QYTJ","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_8","alias_value":"H2C7QNYB","created_at":"2026-05-18T12:26:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:H2C7QNYBM7B7QYTJLD65XKGAOI","target":"record","payload":{"canonical_record":{"source":{"id":"1002.1920","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-02-09T18:01:22Z","cross_cats_sorted":[],"title_canon_sha256":"c7b9d7787b7c54954316eb880fa22945eb0c0646326363702563fb294a914685","abstract_canon_sha256":"dbbb48479513c6af1e5bf7e6ff55361d63fa5df5537ad9e47477c57a0d705982"},"schema_version":"1.0"},"canonical_sha256":"3e85f8370167c3f8626958fddba8c072186d426e1552a4ce7d38696591ae30d3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:32:34.052325Z","signature_b64":"EPhRpjI1V++xJGLwMgqL0M/miGVnmjU+ubgsPhpozcFz6hzBOgywC78kEeB95CUUPlGdQJ8/aSO1he1wLbrVDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3e85f8370167c3f8626958fddba8c072186d426e1552a4ce7d38696591ae30d3","last_reissued_at":"2026-05-18T04:32:34.051846Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:32:34.051846Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1002.1920","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":"2026-05-18T04:32:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mA74wlNRLGJ8jIMCVfkTfMdieY0uDy/vippmerMKc0Wto5mFW4Ocd7scboCxu1YtZ8VHXgn/AoCJGlK2eyGiBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T11:41:06.336589Z"},"content_sha256":"b204ee19e7222102909f404a3fcdd2ccfc3750e0365a46f132cce79054748c55","schema_version":"1.0","event_id":"sha256:b204ee19e7222102909f404a3fcdd2ccfc3750e0365a46f132cce79054748c55"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:H2C7QNYBM7B7QYTJLD65XKGAOI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum memory for entangled two-mode squeezed states","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"A. Serafini, B. M. Nielsen, E. S. Polzik, H. Krauter, K. Jensen, M. B. Plenio, M. M. Wolf, M. Owari, T. Fernholz, W. Wasilewski","submitted_at":"2010-02-09T18:01:22Z","abstract_excerpt":"A quantum memory for light is a key element for the realization of future quantum information networks. Requirements for a good quantum memory are (i) versatility (allowing a wide range of inputs) and (ii) true quantum coherence (preserving quantum information). Here we demonstrate such a quantum memory for states possessing Einstein-Podolsky-Rosen (EPR) entanglement. These multi-photon states are two-mode squeezed by 6.0 dB with a variable orientation of squeezing and displaced by a few vacuum units. This range encompasses typical input alphabets for a continuous variable quantum information "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.1920","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":"2026-05-18T04:32:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lUIU157HJ2pYJr+NTRgpo6F10KyCaYAeFErck5XZYl2GUozSnv9/nMlt93mxPfB3qzLYtkQExp1Q57x8Yo9UCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T11:41:06.337228Z"},"content_sha256":"216675e233f8f9ebcabf2e3e1a0ee91f26d4cc78369347208db736bd2b4f60b8","schema_version":"1.0","event_id":"sha256:216675e233f8f9ebcabf2e3e1a0ee91f26d4cc78369347208db736bd2b4f60b8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/H2C7QNYBM7B7QYTJLD65XKGAOI/bundle.json","state_url":"https://pith.science/pith/H2C7QNYBM7B7QYTJLD65XKGAOI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/H2C7QNYBM7B7QYTJLD65XKGAOI/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":"2026-05-31T11:41:06Z","links":{"resolver":"https://pith.science/pith/H2C7QNYBM7B7QYTJLD65XKGAOI","bundle":"https://pith.science/pith/H2C7QNYBM7B7QYTJLD65XKGAOI/bundle.json","state":"https://pith.science/pith/H2C7QNYBM7B7QYTJLD65XKGAOI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/H2C7QNYBM7B7QYTJLD65XKGAOI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:H2C7QNYBM7B7QYTJLD65XKGAOI","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":"dbbb48479513c6af1e5bf7e6ff55361d63fa5df5537ad9e47477c57a0d705982","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-02-09T18:01:22Z","title_canon_sha256":"c7b9d7787b7c54954316eb880fa22945eb0c0646326363702563fb294a914685"},"schema_version":"1.0","source":{"id":"1002.1920","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.1920","created_at":"2026-05-18T04:32:34Z"},{"alias_kind":"arxiv_version","alias_value":"1002.1920v1","created_at":"2026-05-18T04:32:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.1920","created_at":"2026-05-18T04:32:34Z"},{"alias_kind":"pith_short_12","alias_value":"H2C7QNYBM7B7","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_16","alias_value":"H2C7QNYBM7B7QYTJ","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_8","alias_value":"H2C7QNYB","created_at":"2026-05-18T12:26:07Z"}],"graph_snapshots":[{"event_id":"sha256:216675e233f8f9ebcabf2e3e1a0ee91f26d4cc78369347208db736bd2b4f60b8","target":"graph","created_at":"2026-05-18T04:32:34Z","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":"A quantum memory for light is a key element for the realization of future quantum information networks. Requirements for a good quantum memory are (i) versatility (allowing a wide range of inputs) and (ii) true quantum coherence (preserving quantum information). Here we demonstrate such a quantum memory for states possessing Einstein-Podolsky-Rosen (EPR) entanglement. These multi-photon states are two-mode squeezed by 6.0 dB with a variable orientation of squeezing and displaced by a few vacuum units. This range encompasses typical input alphabets for a continuous variable quantum information ","authors_text":"A. Serafini, B. M. Nielsen, E. S. Polzik, H. Krauter, K. Jensen, M. B. Plenio, M. M. Wolf, M. Owari, T. Fernholz, W. Wasilewski","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-02-09T18:01:22Z","title":"Quantum memory for entangled two-mode squeezed states"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.1920","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:b204ee19e7222102909f404a3fcdd2ccfc3750e0365a46f132cce79054748c55","target":"record","created_at":"2026-05-18T04:32:34Z","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":"dbbb48479513c6af1e5bf7e6ff55361d63fa5df5537ad9e47477c57a0d705982","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-02-09T18:01:22Z","title_canon_sha256":"c7b9d7787b7c54954316eb880fa22945eb0c0646326363702563fb294a914685"},"schema_version":"1.0","source":{"id":"1002.1920","kind":"arxiv","version":1}},"canonical_sha256":"3e85f8370167c3f8626958fddba8c072186d426e1552a4ce7d38696591ae30d3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3e85f8370167c3f8626958fddba8c072186d426e1552a4ce7d38696591ae30d3","first_computed_at":"2026-05-18T04:32:34.051846Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:32:34.051846Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EPhRpjI1V++xJGLwMgqL0M/miGVnmjU+ubgsPhpozcFz6hzBOgywC78kEeB95CUUPlGdQJ8/aSO1he1wLbrVDA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:32:34.052325Z","signed_message":"canonical_sha256_bytes"},"source_id":"1002.1920","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b204ee19e7222102909f404a3fcdd2ccfc3750e0365a46f132cce79054748c55","sha256:216675e233f8f9ebcabf2e3e1a0ee91f26d4cc78369347208db736bd2b4f60b8"],"state_sha256":"26ab28b2bbbb3c9412831c2dd050dea5776699b871f829d462faa82fcac3eef2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VWEKJDekixJ/rl/jda/Fl0mlSzTGcWALa7PR4Kxes96lepU0pZgEpuxCxLuoOHRP1Zx0dq6nTtRpaXRFDF8QBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T11:41:06.340654Z","bundle_sha256":"5319c3b5571e4245d176b108f62498949d5f91486cf5d129530359785f93d492"}}