| QM CONCEPT | FILM ELEMENT | FIELD NOTE |
|---|---|---|
| Superposition | All versions of the dinner party exist simultaneously before the comet | Every branch of reality is equally real until observed. The comet weakens decoherence — the barrier between branches. All timelines bleed into the same physical space. |
| Quantum Decoherence | The comet passing = decoherence weakening | Decoherence is what keeps quantum branches from interacting in everyday life. The comet is a decoherence suppressor. The walls between timelines become permeable. The houses overlap. |
| Many-Worlds Interpretation | Each house is a parallel branch of the same evening | Hugh Everett's 1957 interpretation: every quantum event creates branching realities. Each choice made at the dinner party has spawned a branch. The comet lets them see each other. |
| Observer Effect | Leaving the house collapses which branch you're in | The act of observing a quantum system changes it. Leaving the dark zone and entering another house = observation = collapse into that branch's reality. |
| Wave Function Collapse | Em choosing a "better" timeline at the end | Measurement forces the wave function to pick one value. Em chooses which collapse she wants — she picks the branch where she and Kevin are happy. The other Em collapses out. |
| Schrödinger's Cat | The characters inside the other house | Before you open the box, the cat is both alive and dead. Before you see the other house, those versions of your friends are both real and not. The box is the dark zone between houses. |
| Entanglement | The photographs — taken from impossible perspectives | Entangled particles share information across space. The photographs show that the timeline branches are informationally linked — what happens in one registers in another. |