{"id": "card_question_measurement_gap", "kind": "note", "title": "The measurement gap — what the Hamiltonian does not determine", "body": "Unitary H evolution never selects a single outcome; it flows the whole superposition forward, deterministically and reversibly. What the Hamiltonian does not describe is the actualization - which one outcome occurs (von Neumann's second process). Every interpretation agrees on H and differs only here. The open edge of the Hamiltonian floor, answered by the capstone's single-actualization postulate, not by H.", "source": {"label": "Narrow Highway — the Hamiltonian", "url": "", "authority_tier": "engine_derived"}, "shelf": "codex", "box": "hamiltonian", "bands": ["question", "hamiltonian", "measurement problem", "quantum", "one map"], "subject": "The measurement gap — what the Hamiltonian does not determine", "connections": [{"to_card_id": "card_floor_the_hamiltonian", "relationship": "open_end_of", "evidence": "the measurement gap - the one outcome H does not select"}, {"to_card_id": "card_floor_the_capstone", "relationship": "connects_at", "evidence": "answered by the capstone's single-actualization postulate, not by H"}], "author": "engine", "created_at": 0.0, "updated_at": 0.0, "visibility": "public", "lifecycle_stage": "public", "volatility": "permanent", "surface": "secular", "generated": false, "call": "codex.hamiltonian", "facets": {"subject": ["measurement problem", "one map", "quantum", "question"]}, "presentation": {"glyph": "•", "kind_label": "hamiltonian", "by": "Narrow Highway — the Hamiltonian", "authority": "engine_derived", "posted": "", "standing": ""}, "neighbors": [{"id": "card_floor_the_hamiltonian", "title": "The Hamiltonian — the law of the flow", "relationship": "open end of", "why": "the measurement gap - the one outcome H does not select", "href": "/card/card_floor_the_hamiltonian", "resolved": true}, {"id": "card_floor_the_capstone", "title": "The capstone — one source, many potentials, one end", "relationship": "connects at", "why": "answered by the capstone's single-actualization postulate, not by H", "href": "/card/card_floor_the_capstone", "resolved": true}], "house": {"door": "FIND", "kind": "card", "trail": "connections", "seal": "/card/card_question_measurement_gap", "next_step": {"do": "follow a connection: what this card rests on, and what rests on it", "door": "FIND", "tool": "card_connections", "params": {"id": "card_question_measurement_gap"}}, "ends": "a verdict or a card · the trail · a seal · one next step"}}