{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:M4ZVXAPQXKLPPMZ2OHH3235AOD","short_pith_number":"pith:M4ZVXAPQ","canonical_record":{"source":{"id":"2605.13224","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-05-13T09:15:03Z","cross_cats_sorted":[],"title_canon_sha256":"5d6c1d09ec0df7186dcbe923953f483384d76525aafaa035477a648772792ac6","abstract_canon_sha256":"bfa3c9cec8d02ddb60095761a4ca6525fc1a7f7d332f1d61d3c1a6dd45272ceb"},"schema_version":"1.0"},"canonical_sha256":"67335b81f0ba96f7b33a71cfbd6fa070d27bcb211540e6fdbaf4e2dc2af6e53d","source":{"kind":"arxiv","id":"2605.13224","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.13224","created_at":"2026-05-18T03:08:48Z"},{"alias_kind":"arxiv_version","alias_value":"2605.13224v1","created_at":"2026-05-18T03:08:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.13224","created_at":"2026-05-18T03:08:48Z"},{"alias_kind":"pith_short_12","alias_value":"M4ZVXAPQXKLP","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_16","alias_value":"M4ZVXAPQXKLPPMZ2","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_8","alias_value":"M4ZVXAPQ","created_at":"2026-05-18T12:33:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:M4ZVXAPQXKLPPMZ2OHH3235AOD","target":"record","payload":{"canonical_record":{"source":{"id":"2605.13224","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-05-13T09:15:03Z","cross_cats_sorted":[],"title_canon_sha256":"5d6c1d09ec0df7186dcbe923953f483384d76525aafaa035477a648772792ac6","abstract_canon_sha256":"bfa3c9cec8d02ddb60095761a4ca6525fc1a7f7d332f1d61d3c1a6dd45272ceb"},"schema_version":"1.0"},"canonical_sha256":"67335b81f0ba96f7b33a71cfbd6fa070d27bcb211540e6fdbaf4e2dc2af6e53d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:08:48.288512Z","signature_b64":"Fvg5YJFkAHzSNr80U7jnv3gO5K9T41Wo6I61o1p56viCW0IGmF3jbmIe0i2gI9SEBIh1vMRhu7v3X3V6QP2kBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"67335b81f0ba96f7b33a71cfbd6fa070d27bcb211540e6fdbaf4e2dc2af6e53d","last_reissued_at":"2026-05-18T03:08:48.287928Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:08:48.287928Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2605.13224","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":"2026-05-18T03:08:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hkeda4pSDaw3E39NCchTMH1RVjPZwO2/g96M8QDcS6Pp09e/RzeSMGhR48V1nNCPhBnMpoVpf9WlZrERWBq7BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T20:06:48.097971Z"},"content_sha256":"d9fde3e8afd9ebd3f6928091ad2909e089dceaafca1678dff086948cc755d7f2","schema_version":"1.0","event_id":"sha256:d9fde3e8afd9ebd3f6928091ad2909e089dceaafca1678dff086948cc755d7f2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:M4ZVXAPQXKLPPMZ2OHH3235AOD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On-chip 1 TOPS Hyperdimensional Photonic Tensor Core using a WDM Silicon Photonic Coherent Crossbar","license":"http://creativecommons.org/licenses/by/4.0/","headline":"A silicon photonic crossbar achieves 0.96 TOPS for hyperdimensional tensor computations using time-space-wavelength multiplexing.","cross_cats":[],"primary_cat":"physics.optics","authors_text":"A. Tsakyridis, D. Lazovsky, I. Roumpos, K. Vyrsokinos, M. Moralis-Pegios, N. Pleros, S. Kovaios","submitted_at":"2026-05-13T09:15:03Z","abstract_excerpt":"We demonstrate an on-chip 0.96 TOPS hyperdimensional photonic tensor core by utilizing a time-spacewavelength multiplexed silicon photonic Crossbar (Xbar). The novel architecture relies on serializing the large matrix-vector or tensor-vector products by unfolding multiply and accumulation operations over time domain, while simultaneously distributing the computational workload over different spatial and wavelength channels. We experimentally demonstrate the operation of a 4-channel 2-input TSWDM Xbar that incorporates 56 GHz electroabsorption modulators (EAMs) and 4-channel integrated multiple"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"We demonstrate an on-chip 0.96 TOPS hyperdimensional photonic tensor core by utilizing a time-space-wavelength multiplexed silicon photonic Crossbar (Xbar).","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The assumption that the demonstrated 4x2x1 unit performance and error rates will hold when scaling to larger arrays and higher channel counts without significant additional noise, crosstalk, or power penalties.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"An experimental 4-channel TSWDM silicon photonic crossbar achieves 0.96 TOPS for hyperdimensional tensor operations with 3.9% average error and 93.3% Iris accuracy at 10-30 GBd.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"A silicon photonic crossbar achieves 0.96 TOPS for hyperdimensional tensor computations using time-space-wavelength multiplexing.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"ab22afe3a49a256798bb66492ba2df46b4ccdc3c49974e777e6e0020118a0f33"},"source":{"id":"2605.13224","kind":"arxiv","version":1},"verdict":{"id":"f11dd665-dcee-4992-ab3d-0411336aafd8","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-14T18:52:41.629049Z","strongest_claim":"We demonstrate an on-chip 0.96 TOPS hyperdimensional photonic tensor core by utilizing a time-space-wavelength multiplexed silicon photonic Crossbar (Xbar).","one_line_summary":"An experimental 4-channel TSWDM silicon photonic crossbar achieves 0.96 TOPS for hyperdimensional tensor operations with 3.9% average error and 93.3% Iris accuracy at 10-30 GBd.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The assumption that the demonstrated 4x2x1 unit performance and error rates will hold when scaling to larger arrays and higher channel counts without significant additional noise, crosstalk, or power penalties.","pith_extraction_headline":"A silicon photonic crossbar achieves 0.96 TOPS for hyperdimensional tensor computations using time-space-wavelength multiplexing."},"references":{"count":3,"sample":[{"doi":"10.1016/j.joule.2023.09.004","year":2023,"title":"The Growing Energy Footprint of Artificial Intelligence","work_id":"d9e9c97b-a398-4bb2-97b4-89e4514c57ae","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1038/s41566-020-00754-y","year":null,"title":"Pho- tonics for artificial intelligence and neuromorphic comput ing","work_id":"71bbdbe7-4edb-4c30-9c2c-0e1b80e36223","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.48550/arxiv.2501.07917","year":2020,"title":"Roadmap on neuromorphic photonics","work_id":"d50ee3d8-f0ec-41de-95c0-0d3eb6befe10","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":3,"snapshot_sha256":"977576dd79b445fd2b7ca76232b215a90d7b9ce764afabe653017e17c7ba2e68","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":"f11dd665-dcee-4992-ab3d-0411336aafd8"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:08:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2xRLoe0dnnCVjfWhxKG/8enqBSXB7Jpoydtwsh/0hpKcaDGGqtj4uQWjCxDeQGxKwa0deo7OSH7kkItfQ8ogCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T20:06:48.098586Z"},"content_sha256":"338d93a69ff3836a9109e327183227b49161c3005167b629d313e9c394fe8127","schema_version":"1.0","event_id":"sha256:338d93a69ff3836a9109e327183227b49161c3005167b629d313e9c394fe8127"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M4ZVXAPQXKLPPMZ2OHH3235AOD/bundle.json","state_url":"https://pith.science/pith/M4ZVXAPQXKLPPMZ2OHH3235AOD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M4ZVXAPQXKLPPMZ2OHH3235AOD/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":"2026-05-28T20:06:48Z","links":{"resolver":"https://pith.science/pith/M4ZVXAPQXKLPPMZ2OHH3235AOD","bundle":"https://pith.science/pith/M4ZVXAPQXKLPPMZ2OHH3235AOD/bundle.json","state":"https://pith.science/pith/M4ZVXAPQXKLPPMZ2OHH3235AOD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M4ZVXAPQXKLPPMZ2OHH3235AOD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:M4ZVXAPQXKLPPMZ2OHH3235AOD","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":"bfa3c9cec8d02ddb60095761a4ca6525fc1a7f7d332f1d61d3c1a6dd45272ceb","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-05-13T09:15:03Z","title_canon_sha256":"5d6c1d09ec0df7186dcbe923953f483384d76525aafaa035477a648772792ac6"},"schema_version":"1.0","source":{"id":"2605.13224","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.13224","created_at":"2026-05-18T03:08:48Z"},{"alias_kind":"arxiv_version","alias_value":"2605.13224v1","created_at":"2026-05-18T03:08:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.13224","created_at":"2026-05-18T03:08:48Z"},{"alias_kind":"pith_short_12","alias_value":"M4ZVXAPQXKLP","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_16","alias_value":"M4ZVXAPQXKLPPMZ2","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_8","alias_value":"M4ZVXAPQ","created_at":"2026-05-18T12:33:37Z"}],"graph_snapshots":[{"event_id":"sha256:338d93a69ff3836a9109e327183227b49161c3005167b629d313e9c394fe8127","target":"graph","created_at":"2026-05-18T03:08:48Z","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":4,"items":[{"attestation":"unclaimed","claim_id":"C1","kind":"strongest_claim","source":"verdict.strongest_claim","status":"machine_extracted","text":"We demonstrate an on-chip 0.96 TOPS hyperdimensional photonic tensor core by utilizing a time-space-wavelength multiplexed silicon photonic Crossbar (Xbar)."},{"attestation":"unclaimed","claim_id":"C2","kind":"weakest_assumption","source":"verdict.weakest_assumption","status":"machine_extracted","text":"The assumption that the demonstrated 4x2x1 unit performance and error rates will hold when scaling to larger arrays and higher channel counts without significant additional noise, crosstalk, or power penalties."},{"attestation":"unclaimed","claim_id":"C3","kind":"one_line_summary","source":"verdict.one_line_summary","status":"machine_extracted","text":"An experimental 4-channel TSWDM silicon photonic crossbar achieves 0.96 TOPS for hyperdimensional tensor operations with 3.9% average error and 93.3% Iris accuracy at 10-30 GBd."},{"attestation":"unclaimed","claim_id":"C4","kind":"headline","source":"verdict.pith_extraction.headline","status":"machine_extracted","text":"A silicon photonic crossbar achieves 0.96 TOPS for hyperdimensional tensor computations using time-space-wavelength multiplexing."}],"snapshot_sha256":"ab22afe3a49a256798bb66492ba2df46b4ccdc3c49974e777e6e0020118a0f33"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We demonstrate an on-chip 0.96 TOPS hyperdimensional photonic tensor core by utilizing a time-spacewavelength multiplexed silicon photonic Crossbar (Xbar). The novel architecture relies on serializing the large matrix-vector or tensor-vector products by unfolding multiply and accumulation operations over time domain, while simultaneously distributing the computational workload over different spatial and wavelength channels. We experimentally demonstrate the operation of a 4-channel 2-input TSWDM Xbar that incorporates 56 GHz electroabsorption modulators (EAMs) and 4-channel integrated multiple","authors_text":"A. Tsakyridis, D. Lazovsky, I. Roumpos, K. Vyrsokinos, M. Moralis-Pegios, N. Pleros, S. Kovaios","cross_cats":[],"headline":"A silicon photonic crossbar achieves 0.96 TOPS for hyperdimensional tensor computations using time-space-wavelength multiplexing.","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-05-13T09:15:03Z","title":"On-chip 1 TOPS Hyperdimensional Photonic Tensor Core using a WDM Silicon Photonic Coherent Crossbar"},"references":{"count":3,"internal_anchors":0,"resolved_work":3,"sample":[{"cited_arxiv_id":"","doi":"10.1016/j.joule.2023.09.004","is_internal_anchor":false,"ref_index":1,"title":"The Growing Energy Footprint of Artificial Intelligence","work_id":"d9e9c97b-a398-4bb2-97b4-89e4514c57ae","year":2023},{"cited_arxiv_id":"","doi":"10.1038/s41566-020-00754-y","is_internal_anchor":false,"ref_index":2,"title":"Pho- tonics for artificial intelligence and neuromorphic comput ing","work_id":"71bbdbe7-4edb-4c30-9c2c-0e1b80e36223","year":null},{"cited_arxiv_id":"","doi":"10.48550/arxiv.2501.07917","is_internal_anchor":false,"ref_index":3,"title":"Roadmap on neuromorphic photonics","work_id":"d50ee3d8-f0ec-41de-95c0-0d3eb6befe10","year":2020}],"snapshot_sha256":"977576dd79b445fd2b7ca76232b215a90d7b9ce764afabe653017e17c7ba2e68"},"source":{"id":"2605.13224","kind":"arxiv","version":1},"verdict":{"created_at":"2026-05-14T18:52:41.629049Z","id":"f11dd665-dcee-4992-ab3d-0411336aafd8","model_set":{"reader":"grok-4.3"},"one_line_summary":"An experimental 4-channel TSWDM silicon photonic crossbar achieves 0.96 TOPS for hyperdimensional tensor operations with 3.9% average error and 93.3% Iris accuracy at 10-30 GBd.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"A silicon photonic crossbar achieves 0.96 TOPS for hyperdimensional tensor computations using time-space-wavelength multiplexing.","strongest_claim":"We demonstrate an on-chip 0.96 TOPS hyperdimensional photonic tensor core by utilizing a time-space-wavelength multiplexed silicon photonic Crossbar (Xbar).","weakest_assumption":"The assumption that the demonstrated 4x2x1 unit performance and error rates will hold when scaling to larger arrays and higher channel counts without significant additional noise, crosstalk, or power penalties."}},"verdict_id":"f11dd665-dcee-4992-ab3d-0411336aafd8"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:d9fde3e8afd9ebd3f6928091ad2909e089dceaafca1678dff086948cc755d7f2","target":"record","created_at":"2026-05-18T03:08:48Z","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":"bfa3c9cec8d02ddb60095761a4ca6525fc1a7f7d332f1d61d3c1a6dd45272ceb","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-05-13T09:15:03Z","title_canon_sha256":"5d6c1d09ec0df7186dcbe923953f483384d76525aafaa035477a648772792ac6"},"schema_version":"1.0","source":{"id":"2605.13224","kind":"arxiv","version":1}},"canonical_sha256":"67335b81f0ba96f7b33a71cfbd6fa070d27bcb211540e6fdbaf4e2dc2af6e53d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"67335b81f0ba96f7b33a71cfbd6fa070d27bcb211540e6fdbaf4e2dc2af6e53d","first_computed_at":"2026-05-18T03:08:48.287928Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:08:48.287928Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Fvg5YJFkAHzSNr80U7jnv3gO5K9T41Wo6I61o1p56viCW0IGmF3jbmIe0i2gI9SEBIh1vMRhu7v3X3V6QP2kBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:08:48.288512Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.13224","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d9fde3e8afd9ebd3f6928091ad2909e089dceaafca1678dff086948cc755d7f2","sha256:338d93a69ff3836a9109e327183227b49161c3005167b629d313e9c394fe8127"],"state_sha256":"41f7914074ed7c94ed1af2ba1a87113880062e423e71128c4023a1c7211cc149"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MrCYWuG9OnwA8KOVHKI4XG2BU/CMAcEpoj/BZcIAX0L4c/4NjofoxNgzhD18hl1lmoej7O6yk1kB3IdgX/P/Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T20:06:48.101288Z","bundle_sha256":"4216e590f880789fefa59d0c9e53c5b1444126462f7a3fa9976cc35d40436906"}}