Collapse Reframed

The measurement problem persists because quantum mechanics describes smooth unitary evolution while observation yields a single definite outcome. Collapse is conventionally described as the reduction of superposition, a destructive narrowing that eliminates alternatives. Decoherence theory explains the suppression of interference and the stability of pointer states, and Quantum Darwinism shows how records are distributed across environments, but neither explains why one outcome occurs.

This paper proposes a reframing: collapse is not destruction but the act of actualization under constraint. Decoherence embeds constraints and disperses records, but collapse actualizes one outcome, writes its record, and updates the constraint set. In this framework, entropy is the record of collapse expressed as residue—the redistributed traces of pruning already enacted—and time is the sequential accumulation of records. Objectivity arises naturally once record distribution saturates.

The mathematics of quantum mechanics remains intact; the contribution is interpretive clarity. This reframing yields testable predictions: consensus rises with record distribution, operational collapse latencies increase under weak or balanced constraints, constraint sweeps produce hysteresis, and entropy growth correlates with record accumulation. These signatures can be probed with existing experimental platforms.

By reframing collapse as actualization, we recast the measurement problem, clarify decoherence's role, and establish a physics-facing research program. This also sets the stage for the UCT physics wing (WP01–WP02) and its Tier-2 companion, Structural Physics, which operationalizes collapse under constraint as a working hypothesis; law-level evaluation and criteria are treated explicitly in WP05.

All predictions are stated for regimes where experimental conditions permit clear separation of decoherence (record dispersal) from actualization and where standard quantum dynamics and no-signaling remain fully intact; quantitative fits are reported with platform-specific uncertainties and explicit limits of applicability.

**Keywords:** quantum measurement problem; wavefunction collapse; decoherence; quantum Darwinism; open quantum systems; weak measurement; quantum trajectories; records; objectivity; entropy production; arrow of time.