{"experiment_id":"oam-angular-collision-interference-variant","revision":1,"title":"OAM angular collision/interference and contraction variant","experiment_kind":"physical","intent":"discrimination","status":"illustrative-unadmitted","targets":[{"target_id":"oam-angular-collision-interference","target_kind":"external-reference","target_revision":null,"target_label":"operator-supplied OAM angular collision/interference variant"}],"protocols":[{"protocol_id":"oam-angular-collision-minimal-protocol","name":"Two-mode angular collision and contraction test","minimal_decisive_test":"Collide two independently prepared OAM/multimode wave packets with controlled relative phase and angle, and discriminate a local angular-interference/contraction rule from linear superposition and detector artifacts.","steps":["Calibrate angular alignment and phase delay.","Prepare matched positive, negative, and zero-charge mode pairs.","Sweep collision angle and relative phase in blinded order.","Record full far-field and near-field complex readouts and test the declared angular contraction."],"decision_rule":"The proposed nonlinear angular rule survives only if its predicted phase/angle dependence and contraction signature beat the linear and no-collision controls within uncertainty.","boundary":"Declared mode pair, geometry, phase range, contraction rule, and detector band."}],"controls":[{"control_id":"oam-angular-linear","control_kind":"ablated","description":"Replace interaction medium with a linear reference path.","controlled_variable":"nonlinearity","expected_relation":"Only linear interference should remain."},{"control_id":"oam-angular-zero","control_kind":"negative","description":"Use zero-charge matched modes.","controlled_variable":"input OAM","expected_relation":"No charge-dependent signature should appear."}],"observables":[{"observable_id":"oam-angular-fringe","name":"angular fringe phase","units":"rad","measurement":"phase-resolved far-field fringe fit","aggregation":"per angle and phase","uncertainty_reporting":"fit covariance and alignment error"},{"observable_id":"oam-angular-output-charge","name":"output charge distribution","units":"ℏ per photon","measurement":"modal decomposition","aggregation":"per collision","uncertainty_reporting":"report mode cross-talk"}],"calibration":[{"calibration_id":"oam-angular-angle","quantity":"collision angle","units":"rad","method":"fiducial angular grid","acceptance":"alignment residual below predeclared bound"}],"repetitions":{"replicate_unit":"independent collision","minimum_repetitions":36,"independent_repetitions":6,"randomization":"phase, angle, and charge-pair order randomized","stopping_rule":"complete factorial block"},"uncertainty":{"sources":"angle, phase, detector, mode decomposition, and medium drift","propagation":"joint fit with calibration nuisance parameters","reporting":"report model comparison inputs, not a confidence ranking"},"success_criteria":[{"criterion_id":"oam-angular-success","statement":"The declared angular-interference signature is reproducible and absent from the linear reference.","metric":"model residual difference","comparator":"<","threshold_text":"predeclared difference","units":"normalized residual"}],"falsifiers":[{"criterion_id":"oam-angular-falsifier","statement":"The signature is fully explained by linear interference, alignment, or detector cross-talk.","metric":"nonlinear model improvement","comparator":"<=","threshold_text":"predeclared minimum improvement","units":"normalized residual"}],"confounds":[{"confound_id":"oam-angular-alignment","confound":"angle-dependent clipping changes the mode basis","detection_control":"monitor aperture and power","mitigation":"repeat with oversized aperture"}],"raw_artifacts":[{"raw_artifact_id":"oam-angular-fields","artifact_kind":"near-and-far-field-trace","format":"HDF5","retention":"retain raw frames and phase logs"}],"nonclaims":["An interference or contraction signature does not establish a new conservation law.","No collision result, quantum claim, contraction law, or computation claim is admitted."],"equipment_requirements":[{"requirement_id":"oam-angular-sorter","group_id":"angular-analysis","group_order":1,"group_kind":"required","selection_rule":"any-one","quantity":1,"capability":"phase-resolved multimode field analyzer","units":"system","specification":"near-field and far-field acquisition","equipment_type_ids":["oam-mode-sorter"]}],"dependencies":[{"dependency_id":"oam-angular-depends-conservation","target_experiment_id":"oam-multimode-conservation-test","target_revision":1,"relation_kind":"depends-on","rationale":"The collision variant reuses the calibrated modal balance and sorter."}],"relations":[],"topic_links":[{"link_id":"oam-angular-topic-link","topic_version_id":"illustrative-q8-material-mechanism-experiment@1","relation_kind":"strongest-falsifier","rationale":"The angular variant makes detector and interaction alternatives criticizable at the mechanism boundary."}],"provenance":{"citation_availability":"available","citations":[{"source_id":"oam-light-context","label":"Orbital angular momentum of light context","url":"https://arxiv.org/abs/1009.2675"}],"boundary":"The citation supplies OAM context only; it does not support the proposed angular collision, interference, or contraction rule."},"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":"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"}]}]}