{"experiment_id":"fs-written-exact-optical-computing","revision":1,"title":"Femtosecond-written perovskite/LiNbO3/chalcogenide exact optical computing cell","experiment_kind":"physical","intent":"calibration","status":"illustrative-unadmitted","targets":[{"target_id":"fs-written-exact-computing","target_kind":"external-reference","target_revision":null,"target_label":"operator-supplied fs-written perovskite, LiNbO3, and chalcogenide exact computing proposal"}],"protocols":[{"protocol_id":"fs-exact-minimal-protocol","name":"Finite-state exact operator readout across three material variants","minimal_decisive_test":"Write the same finite optical circuit separately in perovskite, LiNbO3, and chalcogenide variants, inject enumerated basis states, and compare decoded outputs against an exact symbolic oracle with calibrated phase and loss accounting.","steps":["Write and inspect matched finite circuits in the perovskite, LiNbO3, and chalcogenide variants.","Calibrate coupling, phase, and detector response for each material variant.","Run all basis states and selected superpositions.","Compare raw complex outputs with the exact oracle and retain variant-specific controls."],"decision_rule":"The finite operator is supported only if every declared basis output in each material variant meets the exact oracle tolerance and controls isolate crosstalk."}],"controls":[{"control_id":"fs-exact-bypass","control_kind":"negative","description":"Bypass the written circuit.","controlled_variable":"written operator","expected_relation":"Output should match the bypass matrix, not the candidate operator."}],"observables":[{"observable_id":"fs-exact-entry-error","name":"operator entry error","units":"dimensionless","measurement":"complex matrix difference to exact oracle","aggregation":"per basis entry","uncertainty_reporting":"include phase and loss covariance"}],"calibration":[{"calibration_id":"fs-exact-phase","quantity":"written-path phase","units":"rad","method":"interferometric reference","acceptance":"phase drift below oracle comparison tolerance"}],"repetitions":{"replicate_unit":"basis-state injection","minimum_repetitions":24,"independent_repetitions":6,"randomization":"basis and circuit section order randomized","stopping_rule":"complete declared basis set"},"uncertainty":{"sources":"writing variation, coupling, phase, detector noise, and loss","propagation":"complex covariance through oracle comparison","reporting":"retain raw traces and exact code commit"},"success_criteria":[{"criterion_id":"fs-exact-success","statement":"Decoded finite operator agrees with the exact symbolic oracle within tolerance.","metric":"maximum entry error","comparator":"<=","threshold_text":"predeclared tolerance","units":"dimensionless"}],"falsifiers":[{"criterion_id":"fs-exact-falsifier","statement":"A basis-state output cannot be distinguished from a bypass or crosstalk model at the declared precision.","metric":"oracle residual","comparator":">","threshold_text":"predeclared bound","units":"dimensionless"}],"confounds":[{"confound_id":"fs-exact-write-drift","confound":"writing changes material response during the run","detection_control":"interleave reference waveguides","mitigation":"blockwise recalibration"}],"raw_artifacts":[{"raw_artifact_id":"fs-exact-traces","artifact_kind":"complex-output-trace","format":"HDF5 and oracle JSON","retention":"retain raw output and write mask"}],"nonclaims":["Femtosecond writing alone does not establish exact computation in perovskite, LiNbO3, or chalcogenide.","No material, device, or scale claim is admitted; the three variants remain illustrative only."],"equipment_requirements":[{"requirement_id":"fs-writing-platform","group_id":"writing","group_order":1,"group_kind":"required","selection_rule":"any-one","quantity":1,"capability":"femtosecond direct-write platform with metrology","units":"system","specification":"repeatable 3-D placement and write log","equipment_type_ids":["fs-writing-material-platform"]}],"dependencies":[],"relations":[],"topic_links":[{"link_id":"fs-exact-topic-link","topic_version_id":"illustrative-optical-defect-graph-measurement-validity@1","relation_kind":"candidate-protocol","rationale":"The exact-cell protocol separates a written operator from readout and fabrication claims."}],"provenance":{"citation_availability":"available","citations":[{"source_id":"direct-laser-writing-context","label":"Direct laser writing photonics context","url":"https://doi.org/10.1038/nphoton.2012.178"}],"boundary":"The citation supplies direct-writing context only; it does not support exact computation, any named material variant, or a device claim."},"authority":"illustrative-unadmitted-fixture","source_fixture":"cintamani.illustrative-proposed-experiments.v1","canonical_admission":false,"public_d1_seed":false,"evidence_claim":false,"equipment_types":[{"equipment_type_id":"fs-writing-material-platform","revision":1,"title":"Femtosecond 3-D writing and metrology platform","description":"A capability type for writing and inspecting finite 3-D optical paths in a declared material volume.","capabilities":[{"capability_id":"fs-3d-placement","capability":"repeatable 3-D femtosecond placement","units":"µm","specification":"logged write coordinates and address pitch"},{"capability_id":"fs-depth-metrology","capability":"depth-resolved optical metrology","units":"µm","specification":"fiducial grid and aberration calibration"}],"operating_limits":[{"operating_limit_id":"fs-pulse-energy","parameter":"pulse energy","lower_bound":"declared","upper_bound":"declared","units":"nJ","notes":"Material-specific damage limits required."}],"calibrations":[{"equipment_calibration_id":"fs-axis-calibration","quantity":"stage axes","units":"µm","method":"traceable 3-D fiducial","traceability":"retain fiducial map"}],"safety_requirements":[{"safety_requirement_id":"fs-laser-safety","hazard":"femtosecond laser","requirement":"enclosure and interlock","mitigation":"laser safety procedure"}],"interface_requirements":[{"interface_requirement_id":"fs-write-log","interface_kind":"control","specification":"machine-readable write log and material identifier","units":"record"}],"nonclaims":["Femtosecond writing does not imply exact or volumetric computing."],"citations":[{"source_id":"direct-laser-writing-context","label":"Direct laser writing photonics context","url":"https://doi.org/10.1038/nphoton.2012.178"}]}]}