{"experiment_id":"fs-written-volumetric-computing","revision":1,"title":"Femtosecond-written volumetric optical computing volume","experiment_kind":"hybrid","intent":"falsification","status":"illustrative-unadmitted","targets":[{"target_id":"illustrative-volumetric-recurrent-calculation-origin","target_kind":"external-reference","target_revision":null,"target_label":"conjectural volumetric recurrent calculation origin story"}],"protocols":[{"protocol_id":"fs-volume-minimal-protocol","name":"Volume-addressed state and operator test","minimal_decisive_test":"Address separated written paths across a finite 3-D volume, apply a declared optical operator, and test whether state readout remains separable and repeatable across depth and recurrence passes.","steps":["Write a finite 3-D address grid.","Calibrate depth-dependent coupling and readout.","Run one pass and repeated feedback passes on basis states.","Compare address cross-talk and operator output with a volumetric simulation."],"decision_rule":"Volumetric recurrence survives only if address separation, operator agreement, and pass-to-pass stability meet all predeclared bounds."}],"controls":[{"control_id":"fs-volume-planar","control_kind":"matched","description":"Use a planar subset with identical readout.","controlled_variable":"depth","expected_relation":"Depth-specific claim must exceed planar baseline."},{"control_id":"fs-volume-feedback-off","control_kind":"ablated","description":"Break the recurrent feedback path.","controlled_variable":"feedback","expected_relation":"Recurrence-specific signature should disappear."}],"observables":[{"observable_id":"fs-volume-address-crosstalk","name":"address crosstalk","units":"fraction","measurement":"decoded energy outside addressed voxel","aggregation":"per depth and address","uncertainty_reporting":"report depth calibration"},{"observable_id":"fs-volume-pass-stability","name":"pass-to-pass state stability","units":"dimensionless","measurement":"complex state overlap","aggregation":"per recurrence pass","uncertainty_reporting":"include drift and detector uncertainty"}],"calibration":[{"calibration_id":"fs-volume-depth","quantity":"3-D write/read address","units":"µm","method":"fiducial volumetric grid","acceptance":"depth error below address pitch fraction"}],"repetitions":{"replicate_unit":"independent written address volume","minimum_repetitions":12,"independent_repetitions":4,"randomization":"address and depth order randomized","stopping_rule":"complete finite grid unless write safety stop"},"uncertainty":{"sources":"write placement, depth aberration, feedback loss, thermal drift","propagation":"depth-stratified covariance and repeatability intervals","reporting":"release address maps, raw stacks, and simulation input"},"success_criteria":[{"criterion_id":"fs-volume-success","statement":"Repeated passes preserve separable addressed states and match the declared finite operator.","metric":"state overlap and crosstalk","comparator":">=","threshold_text":"predeclared bounds","units":"dimensionless"}],"falsifiers":[{"criterion_id":"fs-volume-falsifier","statement":"Feedback-off or planar controls reproduce the proposed volumetric recurrence signature.","metric":"control-normalized stability","comparator":"<=","threshold_text":"predeclared discriminating margin","units":"dimensionless"}],"confounds":[{"confound_id":"fs-volume-aberration","confound":"depth aberration creates apparent volume dependence","detection_control":"depth-resolved calibration and planar control","mitigation":"correct or bound optical aberration"}],"raw_artifacts":[{"raw_artifact_id":"fs-volume-address-stacks","artifact_kind":"3-D-complex-state-stack","format":"HDF5","retention":"retain raw passes and write/read calibration"}],"nonclaims":["This is the prominent conjectural origin story's test, not confirmation of it.","It does not claim scalable volumetric memory, recurrent computing, or a useful device."],"equipment_requirements":[{"requirement_id":"fs-volume-writer","group_id":"writer","group_order":1,"group_kind":"required","selection_rule":"any-one","quantity":1,"capability":"3-D femtosecond writing and depth metrology","units":"system","specification":"address pitch and depth calibration documented","equipment_type_ids":["fs-writing-material-platform"]},{"requirement_id":"fs-volume-readout-detector","group_id":"readout","group_order":2,"group_kind":"alternative","selection_rule":"any-one","quantity":1,"capability":"depth-resolved complex optical readout","units":"system","specification":"raw depth-resolved stacks and calibration retention","equipment_type_ids":["calibrated-optical-detector-array"]},{"requirement_id":"fs-volume-readout-modal","group_id":"readout","group_order":2,"group_kind":"alternative","selection_rule":"any-one","quantity":1,"capability":"phase-resolved modal volume readout","units":"system","specification":"declared modal basis and depth cross-talk matrix","equipment_type_ids":["oam-mode-sorter"]}],"dependencies":[{"dependency_id":"fs-volume-depends-exact","target_experiment_id":"fs-written-exact-optical-computing","target_revision":1,"relation_kind":"depends-on","rationale":"The volumetric test reuses the exact finite-operator oracle boundary."}],"relations":[],"topic_links":[{"link_id":"fs-volume-origin-link","topic_version_id":"illustrative-volumetric-recurrent-calculation-origin@1","relation_kind":"strongest-falsifier","rationale":"This tests whether volume and recurrence add a discriminating capability."}],"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 the conjectural volumetric recurrence 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":"calibrated-optical-detector-array","revision":1,"title":"Calibrated phase-resolved optical detector array","description":"A capability type for complex field, spectral, or multiview optical acquisition with raw artifact retention.","capabilities":[{"capability_id":"optical-complex-readout","capability":"phase-resolved multimode optical readout","units":"complex samples","specification":"declared spatial, temporal, and dynamic-range limits"},{"capability_id":"optical-raw-retention","capability":"immutable raw acquisition retention","units":"artifact","specification":"raw frames, calibration, and synchronized metadata"}],"operating_limits":[{"operating_limit_id":"optical-detector-dynamic-range","parameter":"dynamic 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context","url":"https://www.rp-photonics.com/photodetectors.html"}]},{"equipment_type_id":"oam-mode-sorter","revision":1,"title":"Phase-resolved OAM and multimode sorter","description":"A capability type for separating and measuring finite orbital-angular-momentum and transverse-mode bases.","capabilities":[{"capability_id":"oam-modal-decomposition","capability":"finite OAM/modal decomposition","units":"mode","specification":"declared basis size and cross-talk matrix"},{"capability_id":"oam-phase-reference","capability":"phase-referenced complex field measurement","units":"rad","specification":"stable reference and timestamped phase calibration"}],"operating_limits":[{"operating_limit_id":"oam-basis-limit","parameter":"modal basis size","lower_bound":"1","upper_bound":"declared","units":"modes","notes":"Report truncation tails."}],"calibrations":[{"equipment_calibration_id":"oam-cross-talk","quantity":"modal cross-talk","units":"fraction","method":"single-mode sweep","traceability":"retain calibration matrix"}],"safety_requirements":[{"safety_requirement_id":"oam-beam-enclosure","hazard":"focused beam","requirement":"beam enclosure","mitigation":"interlocked path"}],"interface_requirements":[{"interface_requirement_id":"oam-data-interface","interface_kind":"data","specification":"complex modal amplitudes plus calibration metadata","units":"file"}],"nonclaims":["No OAM conservation or collision result follows from this capability type."],"citations":[{"source_id":"oam-light-context","label":"Orbital angular momentum of light context","url":"https://arxiv.org/abs/1009.2675"}]},{"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 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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"}]}]}