{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:WYBTTCKF6MEQWEP5BCI5GW7JZM","short_pith_number":"pith:WYBTTCKF","canonical_record":{"source":{"id":"1505.00123","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-05-01T08:48:28Z","cross_cats_sorted":["math-ph","math.MP"],"title_canon_sha256":"c5debbdff701a2cb7957e0477db49be71dd7ff9e3a4f1fc07a13c1241a45f909","abstract_canon_sha256":"6fdead2a0de444b8941100ad6a20bd16a3d845fdccbdffb1bbb46f1c823ac79a"},"schema_version":"1.0"},"canonical_sha256":"b603398945f3090b11fd0891d35be9cb28879cead00d194de7ed8ca7a3a00f59","source":{"kind":"arxiv","id":"1505.00123","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.00123","created_at":"2026-05-18T02:17:13Z"},{"alias_kind":"arxiv_version","alias_value":"1505.00123v1","created_at":"2026-05-18T02:17:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.00123","created_at":"2026-05-18T02:17:13Z"},{"alias_kind":"pith_short_12","alias_value":"WYBTTCKF6MEQ","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WYBTTCKF6MEQWEP5","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WYBTTCKF","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:WYBTTCKF6MEQWEP5BCI5GW7JZM","target":"record","payload":{"canonical_record":{"source":{"id":"1505.00123","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-05-01T08:48:28Z","cross_cats_sorted":["math-ph","math.MP"],"title_canon_sha256":"c5debbdff701a2cb7957e0477db49be71dd7ff9e3a4f1fc07a13c1241a45f909","abstract_canon_sha256":"6fdead2a0de444b8941100ad6a20bd16a3d845fdccbdffb1bbb46f1c823ac79a"},"schema_version":"1.0"},"canonical_sha256":"b603398945f3090b11fd0891d35be9cb28879cead00d194de7ed8ca7a3a00f59","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:17:13.454638Z","signature_b64":"lB7rwRYmOUBrlG+g7JqMAIQowU+gxRCtYp38KbBPsB4ea1SNNfdB0RUQG0BNExVnFlFpHhb2AIAfURvGe2urDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b603398945f3090b11fd0891d35be9cb28879cead00d194de7ed8ca7a3a00f59","last_reissued_at":"2026-05-18T02:17:13.453985Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:17:13.453985Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.00123","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":"2026-05-18T02:17:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a6Sn7Eoy8ka3mr+liWlHFOLjXH1+L65SOvLjZNckMSdDsfSs8swJpBYlUt9acTg9hzAwtHGYgPIXGgsETNcDDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T06:37:27.023635Z"},"content_sha256":"7b6cb5429f7fb62886c59498628428d9303fe36b77a6619d2bd52d5b2e13f124","schema_version":"1.0","event_id":"sha256:7b6cb5429f7fb62886c59498628428d9303fe36b77a6619d2bd52d5b2e13f124"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:WYBTTCKF6MEQWEP5BCI5GW7JZM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"POVM construction: a simple recipe with applications to symmetric states","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math-ph","math.MP"],"primary_cat":"quant-ph","authors_text":"Karthik Bharath, S. P. Shilpashree, Swarnamala Sirsi","submitted_at":"2015-05-01T08:48:28Z","abstract_excerpt":"We propose a simple method for constructing POVMs using any set of matrices which form an orthonormal basis for the space of complex matrices. Considering the orthonormal set of irreducible spherical tensors, we examine the properties of the construction on the $N+1$-dimensional subspace of the $2^N$-dimensional Hilbert space of $N$ qubits comprising the permutationally symmetric states. Similar in spirit to Neumark's result on realization of a POVM as a projective measurement, we present a method to physically realize the constructed POVMs for symmetric states using the Clebsch--Gordan decomp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.00123","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":"2026-05-18T02:17:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y2uPiCVMX/7viGynxJ7KZ85hKS7J2prPGToK7j0fZoFjd8DMdUv1F4FakQesADLNVW20AgurrZ/vMFDR1+1lAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T06:37:27.024448Z"},"content_sha256":"2ffce1274e9a22c7cb6ef8e8caaafd4807112d4879d9a6e0df9cfed66a469984","schema_version":"1.0","event_id":"sha256:2ffce1274e9a22c7cb6ef8e8caaafd4807112d4879d9a6e0df9cfed66a469984"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WYBTTCKF6MEQWEP5BCI5GW7JZM/bundle.json","state_url":"https://pith.science/pith/WYBTTCKF6MEQWEP5BCI5GW7JZM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WYBTTCKF6MEQWEP5BCI5GW7JZM/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":"2026-05-31T06:37:27Z","links":{"resolver":"https://pith.science/pith/WYBTTCKF6MEQWEP5BCI5GW7JZM","bundle":"https://pith.science/pith/WYBTTCKF6MEQWEP5BCI5GW7JZM/bundle.json","state":"https://pith.science/pith/WYBTTCKF6MEQWEP5BCI5GW7JZM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WYBTTCKF6MEQWEP5BCI5GW7JZM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:WYBTTCKF6MEQWEP5BCI5GW7JZM","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":"6fdead2a0de444b8941100ad6a20bd16a3d845fdccbdffb1bbb46f1c823ac79a","cross_cats_sorted":["math-ph","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-05-01T08:48:28Z","title_canon_sha256":"c5debbdff701a2cb7957e0477db49be71dd7ff9e3a4f1fc07a13c1241a45f909"},"schema_version":"1.0","source":{"id":"1505.00123","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.00123","created_at":"2026-05-18T02:17:13Z"},{"alias_kind":"arxiv_version","alias_value":"1505.00123v1","created_at":"2026-05-18T02:17:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.00123","created_at":"2026-05-18T02:17:13Z"},{"alias_kind":"pith_short_12","alias_value":"WYBTTCKF6MEQ","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WYBTTCKF6MEQWEP5","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WYBTTCKF","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:2ffce1274e9a22c7cb6ef8e8caaafd4807112d4879d9a6e0df9cfed66a469984","target":"graph","created_at":"2026-05-18T02:17:13Z","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 propose a simple method for constructing POVMs using any set of matrices which form an orthonormal basis for the space of complex matrices. Considering the orthonormal set of irreducible spherical tensors, we examine the properties of the construction on the $N+1$-dimensional subspace of the $2^N$-dimensional Hilbert space of $N$ qubits comprising the permutationally symmetric states. Similar in spirit to Neumark's result on realization of a POVM as a projective measurement, we present a method to physically realize the constructed POVMs for symmetric states using the Clebsch--Gordan decomp","authors_text":"Karthik Bharath, S. P. Shilpashree, Swarnamala Sirsi","cross_cats":["math-ph","math.MP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-05-01T08:48:28Z","title":"POVM construction: a simple recipe with applications to symmetric states"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.00123","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":"sha256:7b6cb5429f7fb62886c59498628428d9303fe36b77a6619d2bd52d5b2e13f124","target":"record","created_at":"2026-05-18T02:17:13Z","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":"6fdead2a0de444b8941100ad6a20bd16a3d845fdccbdffb1bbb46f1c823ac79a","cross_cats_sorted":["math-ph","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-05-01T08:48:28Z","title_canon_sha256":"c5debbdff701a2cb7957e0477db49be71dd7ff9e3a4f1fc07a13c1241a45f909"},"schema_version":"1.0","source":{"id":"1505.00123","kind":"arxiv","version":1}},"canonical_sha256":"b603398945f3090b11fd0891d35be9cb28879cead00d194de7ed8ca7a3a00f59","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b603398945f3090b11fd0891d35be9cb28879cead00d194de7ed8ca7a3a00f59","first_computed_at":"2026-05-18T02:17:13.453985Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:17:13.453985Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lB7rwRYmOUBrlG+g7JqMAIQowU+gxRCtYp38KbBPsB4ea1SNNfdB0RUQG0BNExVnFlFpHhb2AIAfURvGe2urDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:17:13.454638Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.00123","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7b6cb5429f7fb62886c59498628428d9303fe36b77a6619d2bd52d5b2e13f124","sha256:2ffce1274e9a22c7cb6ef8e8caaafd4807112d4879d9a6e0df9cfed66a469984"],"state_sha256":"874d3771a37bdcc4e4a57fd0568b9b0697a390e74a466e51ebd6ce0942e6adbf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0FW9JwjgvvPjVLLRtw5P7aIrieBxFok47acwMbpMzirfaE1nrzCw+Fr8qfApBnRlOmeJPzXyc8QPFe6DH4xnAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T06:37:27.028660Z","bundle_sha256":"cf8a9a8b58b1a6b7c836a678bcdc77fbfe2bf415e313f21ff74918a7199c3614"}}