Cosmic Uncertainty May Reframe Dark Matter and Dark Energy

A Brown University physicist proposes treating the universe’s scale factor and expansion rate as non-commuting quantum operators, which deforms the Friedmann equation. With a single free exponent, the model can mimic late-time cosmic acceleration without dark energy and predicts a slight deviation from a true cosmological constant; reversing the exponent’s sign could also yield a “classical bounce” instead of a Big Bang. While speculative, upcoming surveys (DESI, Euclid, Rubin Observatory) could test these predictions and help confirm or rule out this quantum-cosmology approach.