{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:4D2WHYILKFWLYWN6VFCBBCQTXQ","short_pith_number":"pith:4D2WHYIL","canonical_record":{"source":{"id":"1502.00998","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-02-03T20:31:36Z","cross_cats_sorted":[],"title_canon_sha256":"ae3025b34c9d54c0e0456380bf37426cf23800f07ed7b8c7dcb19333a8016765","abstract_canon_sha256":"32b7fd500a34890f3fad6fa503e4fb8fd3bb40ef81c647b2c942fa357088bf32"},"schema_version":"1.0"},"canonical_sha256":"e0f563e10b516cbc59bea944108a13bc0281f0e6d994e77a30f7b7bb6e6a91d2","source":{"kind":"arxiv","id":"1502.00998","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.00998","created_at":"2026-05-18T01:10:10Z"},{"alias_kind":"arxiv_version","alias_value":"1502.00998v2","created_at":"2026-05-18T01:10:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.00998","created_at":"2026-05-18T01:10:10Z"},{"alias_kind":"pith_short_12","alias_value":"4D2WHYILKFWL","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"4D2WHYILKFWLYWN6","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"4D2WHYIL","created_at":"2026-05-18T12:29:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:4D2WHYILKFWLYWN6VFCBBCQTXQ","target":"record","payload":{"canonical_record":{"source":{"id":"1502.00998","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-02-03T20:31:36Z","cross_cats_sorted":[],"title_canon_sha256":"ae3025b34c9d54c0e0456380bf37426cf23800f07ed7b8c7dcb19333a8016765","abstract_canon_sha256":"32b7fd500a34890f3fad6fa503e4fb8fd3bb40ef81c647b2c942fa357088bf32"},"schema_version":"1.0"},"canonical_sha256":"e0f563e10b516cbc59bea944108a13bc0281f0e6d994e77a30f7b7bb6e6a91d2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:10:10.852881Z","signature_b64":"+odrqMW3J9ou6k5bu7KeLLOZnct/9khoUBjD67rVd24AOVf0gbg74pCQ+0e0cwQbs49zQQOVtt2zA9YBZFPzBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e0f563e10b516cbc59bea944108a13bc0281f0e6d994e77a30f7b7bb6e6a91d2","last_reissued_at":"2026-05-18T01:10:10.852371Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:10:10.852371Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1502.00998","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":"2026-05-18T01:10:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Uj4OZqPqCqbsD0fWIKOSjIADWSGQs9Z3C0A0WhgjIAH9+yhfsqBT7GHg4Xcp5dpic5oVPBIUIOCSmigNvyNZAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T11:06:19.169536Z"},"content_sha256":"8ab599cb3bd85c1076dfa4f9f0531200ea0c02d46cb9e4bc15a932a6ac720c2f","schema_version":"1.0","event_id":"sha256:8ab599cb3bd85c1076dfa4f9f0531200ea0c02d46cb9e4bc15a932a6ac720c2f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:4D2WHYILKFWLYWN6VFCBBCQTXQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fast expansions and compressions of trapped-ion chains","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"J. Alonso, J. G. Muga, J. P. Home, M. Palmero, S. Mart\\'inez-Garaot","submitted_at":"2015-02-03T20:31:36Z","abstract_excerpt":"We investigate the dynamics under diabatic expansions/compressions of linear ion chains.Combining a dynamical normal-mode harmonic approximation with the invariant-based inverse-engineering technique, we design protocols that minimize the final motional excitation of the ions. This can substantially reduce the transition time between high and low trap-frequency operations, potentially contributing to the development of scalable quantum information processing."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.00998","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":"2026-05-18T01:10:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u1+ofplURmpP+f+NfrxIqZ0SLiC95pYhrOdyX1j9tAIqFjyEjRplaYMlqI6iHBRBXJ/s29RcKsVoNAR+vfCQDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T11:06:19.169880Z"},"content_sha256":"15a42ef4a430a761548e6a702566e5404424a341dacc6e6ff658d6bf680df086","schema_version":"1.0","event_id":"sha256:15a42ef4a430a761548e6a702566e5404424a341dacc6e6ff658d6bf680df086"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4D2WHYILKFWLYWN6VFCBBCQTXQ/bundle.json","state_url":"https://pith.science/pith/4D2WHYILKFWLYWN6VFCBBCQTXQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4D2WHYILKFWLYWN6VFCBBCQTXQ/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":"2026-05-28T11:06:19Z","links":{"resolver":"https://pith.science/pith/4D2WHYILKFWLYWN6VFCBBCQTXQ","bundle":"https://pith.science/pith/4D2WHYILKFWLYWN6VFCBBCQTXQ/bundle.json","state":"https://pith.science/pith/4D2WHYILKFWLYWN6VFCBBCQTXQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4D2WHYILKFWLYWN6VFCBBCQTXQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:4D2WHYILKFWLYWN6VFCBBCQTXQ","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":"32b7fd500a34890f3fad6fa503e4fb8fd3bb40ef81c647b2c942fa357088bf32","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-02-03T20:31:36Z","title_canon_sha256":"ae3025b34c9d54c0e0456380bf37426cf23800f07ed7b8c7dcb19333a8016765"},"schema_version":"1.0","source":{"id":"1502.00998","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.00998","created_at":"2026-05-18T01:10:10Z"},{"alias_kind":"arxiv_version","alias_value":"1502.00998v2","created_at":"2026-05-18T01:10:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.00998","created_at":"2026-05-18T01:10:10Z"},{"alias_kind":"pith_short_12","alias_value":"4D2WHYILKFWL","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"4D2WHYILKFWLYWN6","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"4D2WHYIL","created_at":"2026-05-18T12:29:05Z"}],"graph_snapshots":[{"event_id":"sha256:15a42ef4a430a761548e6a702566e5404424a341dacc6e6ff658d6bf680df086","target":"graph","created_at":"2026-05-18T01:10:10Z","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 investigate the dynamics under diabatic expansions/compressions of linear ion chains.Combining a dynamical normal-mode harmonic approximation with the invariant-based inverse-engineering technique, we design protocols that minimize the final motional excitation of the ions. This can substantially reduce the transition time between high and low trap-frequency operations, potentially contributing to the development of scalable quantum information processing.","authors_text":"J. Alonso, J. G. Muga, J. P. Home, M. Palmero, S. Mart\\'inez-Garaot","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-02-03T20:31:36Z","title":"Fast expansions and compressions of trapped-ion chains"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.00998","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":"sha256:8ab599cb3bd85c1076dfa4f9f0531200ea0c02d46cb9e4bc15a932a6ac720c2f","target":"record","created_at":"2026-05-18T01:10:10Z","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":"32b7fd500a34890f3fad6fa503e4fb8fd3bb40ef81c647b2c942fa357088bf32","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-02-03T20:31:36Z","title_canon_sha256":"ae3025b34c9d54c0e0456380bf37426cf23800f07ed7b8c7dcb19333a8016765"},"schema_version":"1.0","source":{"id":"1502.00998","kind":"arxiv","version":2}},"canonical_sha256":"e0f563e10b516cbc59bea944108a13bc0281f0e6d994e77a30f7b7bb6e6a91d2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e0f563e10b516cbc59bea944108a13bc0281f0e6d994e77a30f7b7bb6e6a91d2","first_computed_at":"2026-05-18T01:10:10.852371Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:10:10.852371Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+odrqMW3J9ou6k5bu7KeLLOZnct/9khoUBjD67rVd24AOVf0gbg74pCQ+0e0cwQbs49zQQOVtt2zA9YBZFPzBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:10:10.852881Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.00998","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8ab599cb3bd85c1076dfa4f9f0531200ea0c02d46cb9e4bc15a932a6ac720c2f","sha256:15a42ef4a430a761548e6a702566e5404424a341dacc6e6ff658d6bf680df086"],"state_sha256":"766e40517a6a2795b56dda864df9b2770a1f0cfcd22e3fea24ac64b640d2d009"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K/oyz1AkytA8wlY0Z0DPG8URTsd8i0+p+EQAmJBLbr8ll7QKAxWSMUa/Ikg9VpBrUpewDi1mNt0fhi8CvrfPAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T11:06:19.171868Z","bundle_sha256":"85994cf5d20a2064ad86caf2bdff902a58a6d1be40ab3188097c35e05ecb4204"}}