Could the universe's accelerating expansion be a quantum boundary effect?

Davies and Magueijo propose that the universe's accelerating expansion requires no cosmological constant or new fields — only a quantum boundary condition at the end of time. By applying the laboratory technique of quantum post-selection to cosmology, they find that a radiation-filled universe post-selected on a specific final quantum state (a Chern-Simons soliton) naturally develops an accelerating phase. A classical observer would wrongly infer a phantom dark energy component with w < −1, a potentially testable signature that distinguishes this mechanism from standard dark energy models.