{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:ZY6UUIFBV46JO2CMK72ACCXMDG","short_pith_number":"pith:ZY6UUIFB","canonical_record":{"source":{"id":"1605.08624","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-05-27T13:13:58Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"8933cd1fee8834fe938fa84fc1896d010a6418febcb22f3bc631b81b05517244","abstract_canon_sha256":"94a88d6001a387e2a2882475e587a8b6fce5fdd41e01cd9202957b96a05ebbfe"},"schema_version":"1.0"},"canonical_sha256":"ce3d4a20a1af3c97684c57f4010aec19891d2aee83a320382a99b8087c5159ce","source":{"kind":"arxiv","id":"1605.08624","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.08624","created_at":"2026-05-18T00:57:12Z"},{"alias_kind":"arxiv_version","alias_value":"1605.08624v2","created_at":"2026-05-18T00:57:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.08624","created_at":"2026-05-18T00:57:12Z"},{"alias_kind":"pith_short_12","alias_value":"ZY6UUIFBV46J","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"ZY6UUIFBV46JO2CM","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"ZY6UUIFB","created_at":"2026-05-18T12:30:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:ZY6UUIFBV46JO2CMK72ACCXMDG","target":"record","payload":{"canonical_record":{"source":{"id":"1605.08624","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-05-27T13:13:58Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"8933cd1fee8834fe938fa84fc1896d010a6418febcb22f3bc631b81b05517244","abstract_canon_sha256":"94a88d6001a387e2a2882475e587a8b6fce5fdd41e01cd9202957b96a05ebbfe"},"schema_version":"1.0"},"canonical_sha256":"ce3d4a20a1af3c97684c57f4010aec19891d2aee83a320382a99b8087c5159ce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:57:12.519489Z","signature_b64":"9QSZoKR6VGODgRywangjCEEt3o6M9RkrcPnUQXaQB03+mguKM09HIMFEhRvLGylfvFyO5lWhUMKCdZVJ+3erAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ce3d4a20a1af3c97684c57f4010aec19891d2aee83a320382a99b8087c5159ce","last_reissued_at":"2026-05-18T00:57:12.519120Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:57:12.519120Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.08624","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":"2026-05-18T00:57:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GZMw6H7PRisG/9nB+jX/5Qsh2qRI2KuwkcJ24QruqdiXEdstt+D2+JcDyvCVx11xvTQG7dsTtLcinbU81DJXBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T12:07:31.336610Z"},"content_sha256":"258d6634543f8d455b4021e7a2b4ad6fde36c6ec6bdf420333a4d4662540cf99","schema_version":"1.0","event_id":"sha256:258d6634543f8d455b4021e7a2b4ad6fde36c6ec6bdf420333a4d4662540cf99"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:ZY6UUIFBV46JO2CMK72ACCXMDG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measurement Protocol for the Entanglement Spectrum of Cold Atoms","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"cond-mat.quant-gas","authors_text":"Alireza Seif, Guanyu Zhu, Hannes Pichler, Mohammad Hafezi, Peter Zoller","submitted_at":"2016-05-27T13:13:58Z","abstract_excerpt":"Entanglement, and, in particular the entanglement spectrum, plays a major role in characterizing many-body quantum systems. While there has been a surge of theoretical works on the subject, no experimental measurement has been performed to date because of the lack of an implementable measurement scheme. Here, we propose a measurement protocol to access the entanglement spectrum of many-body states in experiments with cold atoms in optical lattices. Our scheme effectively performs a Ramsey spectroscopy of the entanglement Hamiltonian and is based on the ability to produce several copies of the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.08624","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":"2026-05-18T00:57:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kpuo+Yy90OhRrwKZQYmpBBT07i7JOMKHrXobLqNRiDO7tVbPXBIGdwjwIe4nTPMBbFNFcJtVWF9nvAO0w/oGCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T12:07:31.337002Z"},"content_sha256":"1b68e3b0670ce35e6f05bddfda173f3d2254d2a309bd2693f4c233410d4b72a7","schema_version":"1.0","event_id":"sha256:1b68e3b0670ce35e6f05bddfda173f3d2254d2a309bd2693f4c233410d4b72a7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZY6UUIFBV46JO2CMK72ACCXMDG/bundle.json","state_url":"https://pith.science/pith/ZY6UUIFBV46JO2CMK72ACCXMDG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZY6UUIFBV46JO2CMK72ACCXMDG/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":"2026-05-28T12:07:31Z","links":{"resolver":"https://pith.science/pith/ZY6UUIFBV46JO2CMK72ACCXMDG","bundle":"https://pith.science/pith/ZY6UUIFBV46JO2CMK72ACCXMDG/bundle.json","state":"https://pith.science/pith/ZY6UUIFBV46JO2CMK72ACCXMDG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZY6UUIFBV46JO2CMK72ACCXMDG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:ZY6UUIFBV46JO2CMK72ACCXMDG","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":"94a88d6001a387e2a2882475e587a8b6fce5fdd41e01cd9202957b96a05ebbfe","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-05-27T13:13:58Z","title_canon_sha256":"8933cd1fee8834fe938fa84fc1896d010a6418febcb22f3bc631b81b05517244"},"schema_version":"1.0","source":{"id":"1605.08624","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.08624","created_at":"2026-05-18T00:57:12Z"},{"alias_kind":"arxiv_version","alias_value":"1605.08624v2","created_at":"2026-05-18T00:57:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.08624","created_at":"2026-05-18T00:57:12Z"},{"alias_kind":"pith_short_12","alias_value":"ZY6UUIFBV46J","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"ZY6UUIFBV46JO2CM","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"ZY6UUIFB","created_at":"2026-05-18T12:30:55Z"}],"graph_snapshots":[{"event_id":"sha256:1b68e3b0670ce35e6f05bddfda173f3d2254d2a309bd2693f4c233410d4b72a7","target":"graph","created_at":"2026-05-18T00:57:12Z","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":"Entanglement, and, in particular the entanglement spectrum, plays a major role in characterizing many-body quantum systems. While there has been a surge of theoretical works on the subject, no experimental measurement has been performed to date because of the lack of an implementable measurement scheme. Here, we propose a measurement protocol to access the entanglement spectrum of many-body states in experiments with cold atoms in optical lattices. Our scheme effectively performs a Ramsey spectroscopy of the entanglement Hamiltonian and is based on the ability to produce several copies of the ","authors_text":"Alireza Seif, Guanyu Zhu, Hannes Pichler, Mohammad Hafezi, Peter Zoller","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-05-27T13:13:58Z","title":"Measurement Protocol for the Entanglement Spectrum of Cold Atoms"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.08624","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":"sha256:258d6634543f8d455b4021e7a2b4ad6fde36c6ec6bdf420333a4d4662540cf99","target":"record","created_at":"2026-05-18T00:57:12Z","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":"94a88d6001a387e2a2882475e587a8b6fce5fdd41e01cd9202957b96a05ebbfe","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2016-05-27T13:13:58Z","title_canon_sha256":"8933cd1fee8834fe938fa84fc1896d010a6418febcb22f3bc631b81b05517244"},"schema_version":"1.0","source":{"id":"1605.08624","kind":"arxiv","version":2}},"canonical_sha256":"ce3d4a20a1af3c97684c57f4010aec19891d2aee83a320382a99b8087c5159ce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ce3d4a20a1af3c97684c57f4010aec19891d2aee83a320382a99b8087c5159ce","first_computed_at":"2026-05-18T00:57:12.519120Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:57:12.519120Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9QSZoKR6VGODgRywangjCEEt3o6M9RkrcPnUQXaQB03+mguKM09HIMFEhRvLGylfvFyO5lWhUMKCdZVJ+3erAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:57:12.519489Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.08624","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:258d6634543f8d455b4021e7a2b4ad6fde36c6ec6bdf420333a4d4662540cf99","sha256:1b68e3b0670ce35e6f05bddfda173f3d2254d2a309bd2693f4c233410d4b72a7"],"state_sha256":"f120ad3470577f4c9b92dce7c00ee561f2607935b8f221f146d3be3164ebdbc3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X7kNcw8f3w2Tdljng0KTZdYOf1VJe6CEZbd5586S8/6BwxiGgk6tSwwbYw4+dkmkkb5DkHT56shFylytDkjqAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T12:07:31.338953Z","bundle_sha256":"4a98e621aece7ccb9ccf51676105895a81af5fd4c7ce3b1e13de26c14a24e52e"}}